Obama: No decision on trying Guantanamo detainees

The detention camp is widely viewed as a stain on America's human rights record. It has held more than 750 captives from around the world since opening in 2002, including many who were caught up in sweeps or sold for bounties during U.S. efforts to route al Qaeda and associated groups after the hijacked plane attacks of Sept. 11, 2001.

About 255 men are still held at Guantanamo, including 50 the United States has cleared for release but cannot repatriate for fear they will be tortured or persecuted in their home countries.

HUMANITARIAN RESETTLEMENT

In Berlin, five international rights groups issued a joint call to European governments to help close Guantanamo by granting humanitarian resettlement and protection to those 50 captives, who are from nations that include China, Libya, Russia, Tunisia, and Uzbekistan.

"This would have a double effect: helping to end the ordeal of an individual unlawfully held in violation of his human rights, and helping end the international human rights scandal that is Guantanamo," said Daniel Gorevan, who manages Amnesty International's "Counter Terror with Justice" campaign.

Joining Amnesty in the statement were the Center for Constitutional Rights, Human Rights Watch, Reprieve and the International Federation for Human Rights. The groups issued the statement after a closed two-day meeting in Berlin.

"This is a key opportunity for both sides of the Atlantic to move beyond the misguided acts of the war on terror: rendition, secret detention, and torture," said Cori Crider, staff attorney at Reprieve, a British group that advocates for prisoners' rights.

The U.S. State Department's legal adviser and other senior officials have been traveling around Europe, North Africa and elsewhere trying to persuade nations to take home their Guantanamo prisoners.