It's the biggest intelligence breach in U.S. history: the leaking of more than half-a-million classified documents on the Wikileaks website in the spring of 2010. Behind it all stand two very different men: Julian Assange, the Internet activist and hacker who published the documents and an Army intelligence analyst named Bradley E. Manning, who's currently charged with handing them over. Assange's mission is to force the U.S. and other governments into transparency with his whistle-blowing website.