The Conversation: Could This Attack Have Been Prevented?

Dec. 30th, 2009— -- ABC's David Muir chats with senior justice correspondent Pierre Thomas about missed signals in the attempted bombing of an airliner on Christmas Day. Sources say the government had intelligence about a Nigerian in Yemen who was being prepared to undertake a terrorist assault. If so, how did suspected bomber Umar Farouk Abdumutallab get through airport security carrying explosives?

Pierre talks to David about the latest from the Department of Homeland Security on the investigation. All this in the mix in today's Conversation.