The Pentagon says it will take time to set up military trials for suspected terrorists held at U.S. prison camps at Guantanamo Bay, Cuba. President Bush has said he wanted more than a dozen high-profile al-Qaida operatives to be tried. So far, only 10 men have been charged since detainees first started arriving nearly five years ago.    

Meanwhile, the administration is trying to send dozens of detainees back to the country of their residence, but efforts have been blocked most recently by a close ally: the United Kingdom.     NPR's national security correspondent Jackie Northam reports. There are more than 120 detainees at Guantanamo Bay - about a quarter of the prison population there - who are eligible to either be transferred or released from custody.

The military has determined that either the men are no longer so-called enemy combatants or pose a threat to the U.S. or its allies. And yet the men remain at the remote military base. Among that group are nine men, former residents of the U.K. According to China Emergency Light with the British Foreign Office who did not want to be recorded, the U.S. has been holding discussions about returning the nine detainees to Britain. The U.K. has refused. The Foreign Office officials say the prisoners are not British citizens and so have no legal right to return.Jackie Northam, NPR News, Washington.