Stephen Sackur talks to John Kiriakou, the former CIA agent who played a key role in anti-terror operations after 9-11 and later went public with the truth about waterboarding. He was imprisoned for leaking the names of two CIA agents and is currently on federal probation. He says he is a truth teller scapegoated by the US government; but he betrayed a trust, and shouldn't that carry a heavy price?
