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.
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.
We're going to touch briefly now on another dramatic story, the deadly explosion at a fertilizer plant in the small Texas town of West. Authorities now confirm that the death toll has risen to 12. That's how many bodies have been recovered so far. The cause of the fire and subsequent blast on Wednesday night are still unknown. From West, here's NPR's Wade Goodwyn.
We turn now to Robert McFadden, who is the senior vice president of The Soufan Group. He's a 30-year veteran of U.S. federal law enforcement, with a special focus on counterterrorism. Thanks for joining us in the program today. Walk us through what happens now. Let's say that the FBI is deluged with thousands of phone calls from people who think, rightly or wrongly, that they have seen one or both of these men before. What does the FBI do?