The latest release brings the total number of men detained at Guantanamo to 15. It held approximately 800 at its peak.
The plea agreements would spare Khalid Sheikh Mohammed and two co-defendants the risk of the death penalty in exchange for guilty pleas.
The Supreme Court has rejected an appeal by a former Guantanamo detainee convicted of killing a U.S. soldier in Afghanistan, among other crimes.
Employees had been instructed to remove the photo because of its portrayal of a nonconsensual sexual act.
