Roger Carstens' work over the last five years as the special envoy for hostage affairs has led to the release of American hostages held by other countries. He was also part of the team that ...

Roger Carstens: Well, Amna, I would love to tell you a little more about it. But, to my mind, this is a negotiation that's in train. It's still in motion. In a perfect world, we will somehow be ...