Ambassador Fredrick Barton assesses challenges facing his bureau stemming from conflicts around the world.

DAVID WESTIN: Good afternoon. I'm David Westin, and I'm privileged to be able to be here with the secretary today. I have a few remarks and I have a script here. I'll make sure I get them all right…

Watch U.S. Department of Homeland Security Secretary Michael Chertoff reflect on government actions during crises and lessons learned from his time in the Bush administration.