The New York Times is reporting federal prosecutors recently questioned Vice President Dick Cheney as part of their investigation into who outted the identity of CIA agent Valerie Plame in apparent retaliation for public criticism of the Iraq war by her husband, ambassador Joseph Wilson. Cheney was not brought before the grand jury and was not questioned under oath. In his recent book Wilson identified Cheney’s chief of staff Scotter Libby as one possible source of the leak.