The Conversation: Terror in the Skies

VIDEO: Diane Sawyer talks with Brian Ross about terror plots.Play
WATCH The Conversation: Security Breakdown

Diane Sawyer chats with Brian Ross about the latest on suspected bomber Umar Farouk Abdulmutallab, a 23-year-old Nigerian national who allegedly carried explosives Friday aboard a trans-Atlantic flight bound for Detroit and nearly succeeded in detonating himself. How did a man on a government terror watch list elude airport security?

Brian talks to Diane about the capabilities of the explosive called PETN that Abdulmutallab allegedly carried on board. How powerful were they? What would have happened if the explosives were detonated? This and more in the mix in today's "Conversation."