"British Prime Minister Tony Blair signed the Olympic Truce at the birthplace of the games Saturday, even as his troops in Iraq were breaking with the spirit of the document that calls for a halt in worldwide conflict during the competition.

Organizers of the truce -- inspired by the cease-fire between warring city-states during the ancient games at Olympia -- say more than 450 world leaders and international personalities have signed the initiative.

Saturday, 20 prime ministers, heads of state and members of royal families signed the document, including Blair, Spain's Queen Sofia and Prince Albert of Monaco.

Organizers said former President Bush, who is leading the official U.S. delegation to the games, was invited but declined to attend.