Well, Robert McFadden is senior vice president of the Soufan Group. He's a 30-year veteran of U.S. federal law enforcement, and he spent many of those years in counterterrorism, and Mr. McFadden, a question I have for you is now that this very important suspect is in custody, what do you do? How do you question him? What do you do now?
Robert Siegel talks to Leon Aron, director of Russian studies at the American Enterprise Institute, about Chechnya. Many may not know the long and troubled history of terrorism in this region, and the disturbing link between Chechen rebels, al-Qaida and Osama bin Laden. According to information from multiple reports, the suspects are from Russia's North Caucasus region. They look at a Facebook-like social media site that the suspects posted on.
As we've reported, the hunt for Dzhokhar Tsarnaev and his brother led masses of police and SWAT teams to Watertown, the Boston suburb west of Cambridge. Last night's confrontation there was dramatic and frightening for many residents, including Kayla Depaulo(ph). Here's how she described what happened when we spoke earlier this afternoon.