Tories 'would publish UFO files'

David Cameron has vowed to publish any secret files that may exist on UFOs if he becomes prime minister. Speaking at one of his regular Cameron Direct public meetings, he pledged to be "open and frank" with any government knowledge about close encounters. The Conservative leader was responding to a question about apparent government cover-ups of UFO activity. Mr Cameron joked: "I'm convinced we've been visited by aliens - one of them is trade secretary Peter Mandelson." "