In these consolidated eases, plaintiffs-appellants Omar Rezaq, Mohammed Saleh, Ibrahim Elgabrowny, and El-Sayyid Nosair — all of whom are currently incarcerated in the federal prison system — appeal the district court’s grants of summary judgment in favor of appellee Federal Bureau of Prisons (BOP) and certain named officials in these actions brought pursuant to 28 U.S.C. §§ 1331, 1343(a)(4), 1346, 2201, and 2202. 1 Rezaq’s action was filed in 2007, and the action by Saleh, Elgabrowny, and Nosair was filed in 2008. The plaintiffs contend that they have a liberty interest in avoiding transfer without due process to the Administrative Maximum Prison (ADX) in Florence, Colorado, where they were formerly housed. In separate orders, the district court rejected this argument and found that the plaintiffs lack a cognizable liberty interest in avoiding confinement at ADX. While the BOP agrees with this reasoning, it also contends that all of the plaintiffs’ claims became moot when they were transferred to other prisons. Exercising jurisdiction under 28 U.S.C. § 1291, we conclude that these cases are not moot and affirm on the merits.
I. Factual Background
The plaintiffs in these actions were all convicted of terrorism-related offenses. Rezaq was convicted on one count of aircraft piracy for his involvement in the 1985 hijacking of EgyptAir Flight 648, in which fifty-seven passengers were killed.
See United States v. Rezaq,
The plaintiffs were initially assigned to general population units at United States Penitentiaries (USPs). Aplt.App. Vol. 1(c) at 499; Vol. 11(c) at 2063-64. They were each subsequently transferred to the gen *1005 eral population unit at ADX. Rezaq was transferred from USP-Leavenworth to ADX shortly after his conviction in 1996. Id., Vol. 1(c) at 489, 498. The terrorist attacks of September 11, 2001, and ensuing national security concerns precipitated the other transfers. In the hours after the attacks, Saleh, Elgabrowny, and Nosair were placed in administrative segregation at their respective prisons and, over the course of the next two years, they were transferred to ADX, without notice or hearing. Id., Vol. 11(c) at 2064. The BOP cited prison safety and national security as reasons for the transfers.
ADX is the most restrictive and secure prison operated by the BOP. Id. at 2058. As the only facility of its kind in the federal system, it is reserved for inmates who require “the highest custody level that can be assigned to an inmate.” Id., Vol. 1(b) at 367. Prisoners housed in the general population unit at ADX spend twenty-three hours a day confined to their cells. Id., Vol. 11(c) at 2058. The typical cell at ADX measures eighty-seven square feet and contains a bed, desk, sink, toilet, and shower. Id. Inmates take their meals alone in their cells. Id. Although BOP policy provides for ten hours of recreation per week, recreation is frequently cancelled due to staff shortages, mass shakedowns, or adverse weather. Id. at 2059-60, 2205-2226.
According to the BOP, these carefully controlled conditions serve two primary penological interests. The stated missions of ADX include: (1) “maintaining the safety of both staff and inmates, while eliminating the need to increase the security of other penitentiaries”; and (2) “confining] inmates under close controls while providing them opportunities to demonstrate progressively responsible behavior ... and establish readiness for transfer to a less secure institution.” Id., Vol. 1(b) at 367. Most inmates at ADX, like those in this case, were transferred there from other prisons. An inmate may be transferred because he poses a physical threat to other inmates or staff, presents an escape risk, or requires “increased monitoring.” Id., Vol. 11(d) at 2363. Other inmates are transferred to ADX for reasons unrelated to their behavior. For example, some inmates “require high security but can’t function in open population facilities due to cooperation with the government or other protection needs.” Id. In some eases, the BOP may designate an inmate to ADX directly following conviction. Id.
While each of the plaintiffs was transferred from a USP to ADX, they were each transferred out of ADX during the course of this litigation to one of the BOP’s two Communication Management Units (CMUs). CMUs are recently created facilities designed to monitor inmate communications with the outside world. Id., Vol. 11(e) at 2750. These facilities are fully contained within USPs — specifically, USP-Marion and USP-Terre Haute — and are more restrictive than the general population units at the USPs. Id. But they are less restrictive than the general population unit at ADX. Id. Rezaq was transferred from USP-Leavenworth to ADX and later transferred to the CMU at USP-Marion. Id., Vol. 1(a) at 23. Saleh and Elgabrowny were transferred from USP-Florence to ADX and later transferred to the CMU at USP-Marion. Id., Vol. 11(d) at 2480, 2486. Nosair was transferred from USP-Pollock to ADX and later transferred to the CMU at USP-Terre Haute. Id. at 2484.
The plaintiffs did not receive hearings before they were transferred to ADX. However, after this litigation was commenced, BOP regional director and codefendant Michael Nalley issued revised procedures for wardens to follow before referring an inmate to ADX. The parties *1006 refer to the document outlining these procedures as the “Nalley Memorandum.” Relying on the revised transfer procedures in the Nalley Memorandum, the BOP conducted retroactive transfer hearings for those inmates who were transferred to ADX prior to 2008. Id., Vol. 11(f) at 2862. The procedures provided that the inmate being referred should receive notice of the transfer hearing, an opportunity to participate in the hearing, a written recommendation by the hearing officer, and administrative review of the regional director’s decision by the BOP’s general counsel. See Defs.-Aplees.’ Mot. to Dismiss for Mootness at 23-25.
The plaintiffs allege that these hearings were provided solely as a result of this litigation. Aplt. Br. at 15. The BOP concedes the plaintiffs were prioritized in the hearing process because of the litigation. Aplt.App. Vol. 11(f) at 2870. In the end, every retroactive hearing resulted in a recommendation of continued ADX placement. Id. at 2794. The plaintiffs allege that “[n]o prisoner has ever successfully appealed a retroactive transfer hearing decision.” 2 Id. at 2762.
Inmates housed at ADX may improve their conditions of confinement by seeking admission to the Step-Down Program, a “stratified system of less-restrictive housing” that ineentivizes inmates to adhere to the prison’s expectations for their conduct. See id., Vol. 11(d) at 2348. Once admitted to the program, ADX inmates may progress from the general population unit through the Intermediate, Transitional, and Pre-Transfer Units “with increasing degrees of personal freedom at each stage.” Id. at 2349. ADX policy states that “[ejvery inmate has the opportunity to demonstrate he may be housed in a less-restrictive unit.” Id.
The plaintiffs were repeatedly denied admission to the Step-Down Program. Eventually, however, all of the plaintiffs were admitted to the program and later transferred to other prisons. None of the plaintiffs are still housed at ADX. Each is now housed in one of the BOP’s two CMUs. Id., Vol. 11(e) at 2750.
II. Procedural Background
District Court Proceedings in Rezaq
Rezaq filed suit in 2007 against the BOP and several named officials to challenge his transfer to ADX and his conditions of confinement under the Due Process Clause. Id., Vol. 1(f) at 1341^42. He argued that he had a liberty interest in avoiding transfer to ADX without due process. Id. at 1341. He also argued that his retroactive transfer hearing did not comply with the requirements of procedural due process. Id.
The defendants moved for summary judgment, and the motion was referred to a magistrate judge. The defendants contended that because Rezaq did not have a liberty interest in avoiding the conditions of confinement at ADX, he was not entitled to due process in the transfer determination. Id. at 1342. They also argued that, *1007 if a liberty interest did exist, Rezaq received sufficient process. Id.
The magistrate judge recommended that summary judgment be granted for the defendants.
Id.
at 1338, 1367. She agreed with the defendants that the conditions of confinement at ADX did not give rise to a liberty interest, noting that “to date no court in the Tenth Circuit has held” as much.
Id.
at 1350. Applying the four factors from
Estate of DiMarco v. Wyoming Department of Corrections,
The district court considered Rezaq’s objections to the recommendation and concluded that the recommendation was correct. Id. at 1472-73. The court entered judgment, and Rezaq filed a timely notice of appeal.
District Court Proceedings in Saleh
Saleh, Elgabrowny, and Nosair, who are represented by the same counsel as Rezaq, brought similar procedural due process claims against the BOP in a 2008 consolidated complaint. See id., Vol. 11(a) at 1525-26; Vol. 11(g) at 3292. They challenged both their transfers to the general population unit at ADX and their repeated denials of admission to the ADX Step-Down Program. Id., Vol. 11(g) at 3206-07. In a motion for summary judgment, the BOP argued that the claims were moot because all of the plaintiffs had received retroactive transfer hearings and had been admitted to the Step-Down Program. Id. at 3207. The BOP also argued that, even if the claims were not moot, the plaintiffs did not have a liberty interest in avoiding confinement at ADX or in being admitted to the Step-Down Program. Id.
The case was referred to the same magistrate judge who handled Rezaq. The magistrate judge rejected the BOP’s mootness arguments, but she determined that the plaintiffs did not have a liberty interest and recommended granting summary judgment in favor of the BOP. Id. at 3236. The district court considered objections to the recommendation filed by both the plaintiffs and the BOP and adopted the magistrate judge’s recommendation. Id. at 3302. The court concluded that the transfer claim was not moot because the plaintiffs’ “ADX placement continues to affect the conditions of ... confinement despite ... transfer out of the institution.” Id. at 3294. Applying the DiMarco factors, the court determined that the plaintiffs did not have a protected liberty *1008 interest in avoiding the conditions of confinement at ADX. Id. at 3302. The court entered judgment for the BOP, and this appeal followed.
III. Mootness
As a threshold matter, we must address the BOP’s contention that the plaintiffs’ due process claims are moot. At different points in the course of this litigation, all four of the plaintiffs were admitted to the Step-Down Program and ultimately transferred out of ADX. After these appeals were filed, the BOP filed a motion to dismiss on mootness grounds because (1) plaintiffs are no longer housed at ADX, and (2) the challenged transfer procedures (the Nalley Memorandum) are no longer in effect. The BOP argues that these developments mooted plaintiffs’ challenges to their transfers to ADX (“the transfer claims”) and their denials of admission to the Step-Down Program (“the Step-Down Program claims”). Plaintiffs now concede the mootness of the Step-Down Program claims. But they maintain that they still have a cognizable interest in the transfer claims because they have not been returned to their pre-ADX prison conditions, which is part of their requested relief.
Federal courts only have jurisdiction to consider live, concrete cases or controversies.
Rio Grande Silvery Minnow v. Bureau of Reclamation,
The crux of the mootness inquiry in an action for prospective relief is whether the court can afford meaningful relief that “ ‘will have some effect in the real world.’ ”
See Rio Grande,
The BOP’s first mootness rationale is that plaintiffs’ transfers out of ADX render it speculative that they would again be subject to the same transfer policies, especially because the challenged policies were superseded by revised policies. Generally speaking, the “ ‘[withdrawal or alteration of administrative policies can moot an attack on those policies.’ ”
Rio Grande,
The BOP is correct that the procedures that controlled plaintiffs’ initial transfers are no longer in force. But this point places undue focus on the policies themselves, which detracts from the real issue: whether the BOP has sufficiently mitigated the effects of any harm caused by the old policies. Even though the new transfer policies
may
provide adequate process, the case is not moot if the BOP made decisions under the old policies that have ongoing, long-term consequences for the plaintiffs that could be mitigated by an award of prospective relief.
See Colvin v. Caruso,
The BOP also argues that any pronouncement we make on the issues raised would amount to an advisory opinion because all four plaintiffs have been transferred from ADX to other facilities. Even though all four plaintiffs are now housed in less-restrictive facilities when compared to ADX, they maintain that their current conditions are still more restrictive than their pre-ADX conditions.
We conclude that the case is not moot for two reasons. First, the plaintiffs’ transfers to CMUs did not “completely and irrevocably eradicate[] the effects of the alleged violation” because they have never been returned to their pre-ADX placements in USP-GPs.
See Davis,
Second, some prospective relief remains available. Assuming, only for purposes of deciding whether the cases are moot, that the plaintiffs have a liberty interest in avoiding transfer to ADX without due process
and
their retroactive transfer hearings were constitutionally deficient, this court could award meaningful relief in the form of additional process. The BOP has failed to show that new due process hearings could not result in the plaintiffs’ return to general population conditions. As the district court wrote in
Saleh,
the transfer claims “challengef ] the process by which plaintiffs were placed at ADX.... Were the Court to order the BOP to provide plaintiffs additional process to determine whether their transfers to ADX were proper, this new process could result in a finding that plaintiffs
*1010
were not properly placed in ADX in the first place and thus should be restored to their pre-ADX status and corresponding placements.” Aplt.App. Vol. II(g) at 8294. Along the same lines, the magistrate judge wrote in
Rezaq
that “the heart of Plaintiffs request for relief is for transfer to a less-restrictive facility. This remedy has not been provided to him and therefore, prospective relief remains available.”
3
Id.,
Vol. 1(f) at 1345. We agree. A case is not moot when there is
some
possible remedy, even a partial remedy or one not requested by the plaintiff.
See Church of Scientology of Cal. v. United States,
In sum, if plaintiffs prevail on appeal, we could grant meaningful prospective relief. Even though they are no longer housed at ADX, plaintiffs retain “a legally cognizable interest in the final determination of the underlying questions of fact and law.”
Davis,
IV. Liberty Interest/Due Process Claim
Plaintiffs argue that they have a protected liberty interest in avoiding the conditions of confinement at ADX — a facility that, they maintain, creates an “atypical and significant hardship ... in relation to the ordinary incidents of prison life.” Aplt. Br. at 17 (citing
Sandin v. Conner,
This court reviews de novo a district court’s entry of summary judgment, viewing the facts in the light most favorable to the nonmoving party.
McCarty v. Gilchrist,
*1011
The Fifth Amendment provides that no person shall “be deprived of life, liberty, or property, without due process of law.” U.S. Const, amend. V. “A liberty interest may arise from the Constitution itself, by reason of guarantees implicit in the word ‘liberty,’ or it may arise from an expectation or interest created by state laws or policies.”
Wilkinson,
A protected liberty interest only arises from a transfer to harsher conditions of confinement when an inmate faces an “ ‘atypical and significant hardship ... in relation to the ordinary incidents of prison life.’”
Id.
at 223,
Our sister circuits are certainly not in agreement regarding the correct approach. While some circuits compare the conditions of confinement at issue to those in the general prison population,
see, e.g., Beverati v. Smith,
Most recently, in
DiMarco,
we similarly declined to make “a rigid ei
*1012
ther/or assessment” of proper comparator evidence, opting instead to outline four potentially relevant, nondispositive factors.
4
[rjelevant factors might include whether (1) the segregation relates to and furthers a legitimate penological interest, such as safety or rehabilitation; (2) the conditions of placement are extreme; (3) the placement increases the duration of confinement, as it did in Wilkinson-, and (4) the placement is indeterminate (in Wilkinson the placement was reviewed only annually).
Id.
While courts in this circuit have used these factors to guide the liberty interest analysis,
see, e.g., Matthews v. Wiley,
We are not constrained to apply the four factors that the
DiMarco
court considered potentially relevant, but we are satisfied that a similarly guided inquiry is appropriate under the facts of this case. And while we also are not bound to give more or less weight to any given factor, we recognize that
Wilkinson
called the conditions of confinement in the Ohio supermax prison “sever[e]” and “synonymous with extreme isolation” but ultimately placed
*1013
the weight of its analysis on the indeterminate duration of confinement and the effect the placement had on an inmate’s parole eligibility.
See Wilkinson,
1) The Segregation Relates to and Furthers the BOP’s Legitimate Penological Interests
The district court concluded that the BOP’s legitimate interests in prison safety and national security justified plaintiffs’ placements at ADX. Rather than question the legitimacy of the BOP’s asserted interests or the rationality of segregation in relation to those interests, the plaintiffs dismiss the factor itself as “not relevant to the liberty interest inquiry.” Aplt. Br. at 24.
This court has upheld an inmate’s placement in segregation, even for an extended period of time, for safety reasons.
See DiMarco,
The First Circuit engages in a similar, albeit more stringent, inquiry when it determines whether “the central condition— isolation from other prisoners — was essential to its purpose.”
See Skinner v. Cunningham,
Plaintiffs argue that it is improper for the court to consider penological interests in determining whether a liberty interest exists. They contend that any inquiry into the necessity of restrictive confinement should be made at a due process hearing, not in determining at the outset whether a liberty interest exists. Aplt. Br. at 23. We disagree. Legitimate penological interests are a relevant consideration under settled Tenth Circuit prece
*1014
dent.
See DiMarco,
The government opened ADX to house inmates who, like plaintiffs, pose unusual security and safety concerns. These concerns stem from a uniquely federal penological interest in addressing national security risks by segregating inmates with ties to terrorist organizations. The BOP established that continued placement of these inmates in general population units could compromise prison safety or, given the unique criminal backgrounds of these plaintiffs, national security. We conclude that segregated confinement relates to and furthers the penological interests asserted in this case.
2) ADX Conditions Are Not Extreme
The district court next considered whether the conditions of confinement at ADX are extreme. Plaintiffs primarily challenge the district court’s use of the Ohio supermax facility, at issue in Wilkinson v. Austin, as a basis for comparison. Aplt. Br. at 26. They contend that the appropriate comparison is ordinary prison life in the “particular prison system,” which would foreclose consideration of a state supermax facility in a case involving federal inmates. Id. at 27. Plaintiffs also contend that, even if the facility in Wilkinson is used as a comparator, the conditions at ADX are not materially different than those at the Ohio supermax prison. See Aplt. Reply Br. at 13-14 (chart comparing conditions at the two facilities).
As we have noted, it is appropriate to compare the nature of the challenged conditions to the type of nonpunitive confinement routinely imposed on inmates serving comparable sentences. A comparison to the conditions at issue in Wilkinson can also be instructive when considering conditions in segregated confinement.
The conditions at ADX are undeniably harsh. When they were housed at ADX, plaintiffs had control over the lights in their cells, the opportunity for outdoor recreation, regular contact with staff, and the ability to occasionally communicate with other inmates. 6 ApltApp. Vol. 1(a) at *1015 207-10. Their cells, while unquestionably small and stark, contained a television that aired black-and-white educational and religious programming. Id., Vol. 11(c) at 2061. The inmates spent twenty-three hours per day in their cells. Id. at 2058. When they were permitted outdoor recreation, the inmates remained alone in fenced-in areas slightly larger than their cells. Id. at 2059. The inmates were permitted five “no contact” social visits and two fifteen-minute phone calls per month. Id. at 2060-61.
There are some similarities between the conditions at ADX and those at the Ohio supermax prison in
Wilkinson.
Because the conditions at issue in
Wilkinson
imposed an atypical and significant hardship on inmates “under any plausible baseline,” it is clear that the Supreme Court did not intend for courts to make side-by-side comparisons of challenged conditions and the conditions in that case. But we must take note of the facts that led the Court to its conclusion. For example, in
Wilkinson,
the Court found that “almost all human contact is prohibited, even to the point that conversation is not permitted from cell to cell.”
But we need not draw fine distinctions based on these comparisons. The conditions at ADX, like those at the Ohio super-max prison in
Wilkinson,
do not, in and of themselves, give rise to a liberty interest because they are substantially similar to conditions experienced in any solitary confinement setting.
See Wilkinson,
Finally under this factor, we must address plaintiffs’ contention that the district court improperly incorporated Eighth Amendment and substantive due process precedent to determine whether the challenged conditions were extreme. Aplt. Br. at 27-29. While the district court used the phrase “the basic necessities of life,” which is drawn from Eighth Amendment precedent, it is clear that the court did not import a different standard to the liberty interest analysis. The district court’s analyses were consistent with our approach in DiMarco.
S) ADX Placement Does Not Increase the Duration of Confinement
Transfer to a higher security facility may lengthen an inmate’s period of incarceration if the transfer “disqualifies an otherwise eligible inmate for parole consideration.”
Wilkinson,
f) The Plaintiffs’ Placements in ADX Were Not Indeterminate
Finally, the duration and indeterminacy of a placement in extreme conditions is often a critical consideration in liberty interest analysis.
See Wilkinson,
Plaintiffs argue, essentially under this factor, that the duration of segregated confinement
itself
is atypical and significant. This argument has some support in Tenth Circuit precedent.
See, e.g., Trujillo v. Williams,
Here, the periodic review process at ADX included opportunities for plaintiffs to participate. While plaintiffs were housed at ADX for many years, they were given regular reevaluations of their placement in the form of twice-yearly program reviews.
See
Aplt.App. Vol. 1(f) at 1362-63; Vol. 11(g) at 3301. These periodic reviews included procedural protections, including the chance to appeal decisions through an administrative process. Importantly, however, it is not necessary for us to closely review the process at this stage.
See DiMarco,
5) Summary of DiMarco Factors
The totality of these factors indicate that the inmates did not have a liberty interest in avoiding confinement at ADX. Because no liberty interest is implicated, we do not reach the question of whether the inmates received adequate process to justify their transfers to ADX.
*1017 V. Conclusion
Because this case presents a live controversy in which the court could afford meaningful prospective relief, we DENY both the motion to dismiss and the amended motion to dismiss filed by defendants. Yet the inmates lack a cognizable liberty interest in avoiding the conditions of confinement at ADX, so no due process protections were required before they were transferred to that facility. We therefore AFFIRM the judgments of the district court.
Notes
. In Case Number 11-1069, Rezaq also brought a claim for judicial review of federal administrative action pursuant to 5 U.S.C. § 702. See Aplt.App. Vol. 1(a) at 20, 33-34.
. In a motion to dismiss on mootness grounds filed in this court, the BOP argued that the procedures established by the Nalley Memorandum are no longer in force. See Defs.-Aplees.’ Mot. to Dismiss for Mootness at 6. The BOP explained that the "Dodrill Memorandum,” issued by BOP Assistant Director D. Scott Dodrill after summary judgment briefing in this case, revised the criteria for referring an inmate to ADX. Id. Under the procedures set forth in the Dodrill Memorandum, referrals to ADX are handled by the BOP’s Designation and Sentence Computation Center ("DSCC”). Id. The inmate being referred receives a hearing that may be appealed to the DSCC chief and the BOP’s general counsel. Id.
. Of course, Rezaq now resides in a less-restrictive facility. But to the extent that a retroactive transfer hearing could result in a determination that he should never have been transferred to ADX in the first place, the BOP could decide to return him to his pre-ADX placement. So while the current circumstances differ from those that the magistrate judge confronted, prospective relief is still available.
. In an even more recent case, an inmate in the Colorado state prison system claimed to have a liberty interest in avoiding prolonged confinement in administrative segregation.
See Toevs v. Reid,
. Plaintiffs argue that the
DiMarco
factors are inconsistent with the Supreme Court's rulings in
Sandin
and
Wilkinson. See
Aplt. Br. at 22-36. Because we are bound by prior panel decisions absent superseding en banc review or Supreme Court decisions, we need not address these arguments.
See United States v. Meyers,
. While there is a factual dispute over the degree of human contact permitted at ADX,
see
Aplt. Br. at 38-41; Aplee. Br. at 39-43, this dispute does not affect our determination that the conditions are not extreme. Even viewing the disputed facts in the light most favorable to plaintiffs, the limitations on human contact were not "especially severe” in relation to most solitary confinement facili
*1015
ties.
See Wilkinson,
