Public pressure is building on the Bush administration to release or press charges against a Canadian citizen who has been held at Guantananmo Bay since he was 15 years old. Omar Khadr is the only known Canadian held at the military prison. He has claimed that he been beaten and threatened with rape. Over the weekend the Toronto Star newspaper called on Canadian Prime Minister Paul Martin to press the US to try Khadr, who is now 18 years old, or release him.