- 9/11 Families for Peaceful Tomorrows
- ACLU – Close Guantánamo
- Amnesty International
- Amnesty International support closing Guantánamo
- Andy Worthington
- Antitorture.org Center for Human Rights Am. Univ. Law School
- Cage Prisoners
- Center for Constitutional Rights
- Center for Constitutional Rights Close Gitmo site
- Code Pink Global Hunger Strike: Justice for Guantanamo Prisoners!
- CloseGuantanamo.org
- The Justice Campaign
- The London Guantanamo Campaign
- National Lawyer’s Guild letter to Obama about hunger strike
- National Religious Campaign Against Torture
- New America Foundation
- New Security Action CloseGitmoNow.org
- No More Gitmos
- Nonviolence International
- Office of the Americas
- Prisoner Hunger Strike Solidarity (U.S. Prisoners strike July 8-Sept 5, 2013)
- Reprieve
- SOA Watch
- StandFastForJustice
- Stop Mass Incarceration
- Support Geneva Conventions
- TASSC
- Team Delta Guantánamo Guidebook
- Veterans for Peace
- Witness Against Torture
- World Can’t Wait
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