LONDON (AFP) - Britain will have 13,500 troops on duty for the 2012 London Olympics, and will also deploy two warships, warplanes and ground-to-air missiles, the defence minister announced Thursday. Philip Hammond said the games were a "once in a generation" event for the country and that Britain wanted them to be secure for athletes coming from around the world. He said the military would deploy 5,000 personnel to support police and civil authorities with a 1,000-strong "unarmed contingency force for deployment in the event of an Olympics-related civil emergency."