Obama pinned responsibility directly on the Senate if something were to go awry. "And heaven forbid we've got a problem where we could have prevented a terrorist attack or apprehended someone who is engaged in dangerous activity but we didn't do so simply because of inaction in the Senate." McConnell is calling the Senate back into session Sunday, just hours...» Read More
Valentina Soria, security analyst at IHS Jane's and Richard Barrett, director at Qatar International Academy for Security Studies, discuss the Chechen link to the Boston Bombing and whether there's a case of intelligence failure.
James Forest, director of security studies at UMass Lowell, questions whether the Boston bombing was a case of "lone wolf terrorism".
Mark McClelland, head of North America at Maplecroft, says the Boston bombing is significant because it's the first successful Islamic attack in the U.S. since 9/11 and because of its Chechen link.
NBC's Pete Williams reports on the latest updates from federal investigations into Dzhokhar Tsarnaev, the second suspect in the Boston Marathon bombings.
Dzhokhar Tsarnaev, the second suspect in the Boston Marathon bombings has been caught alive in Watertown, Mass.
NBC's Kerry Sanders describes the scene outside the home in Watertown, MA where the second bombing suspect is believed to be found.
The very latest on police operations in a Watertown neighborhood, with NBC's Brian Williams.
There are conflicting reports whether the person on the boat is stationary or moving, with NBC's Brian Williams.
Police converge on a home in Watertown, MA.
NBC's Pete Williams reports the latest developments on the manhunt for the second bombing suspect.
NBC's Lester Holt describes the scene where police have converged in Watertown, MA.
NBC's Kerry Sanders describes the scene of the latest round of fire.
There are reports that gun shots have been fired in Watertown, MA.
Mitch Epner, former federal prosecutor, explains how the suspect would be apprehended and brought to trial. "This would be a death penalty-eligible case," he says.
An update on the search for the second bombing suspect, with CNBC's Bill Griffeth.
CNBC's Courtney Reagan has a statement from the dead bombing suspect's mother-in-law.
Police provide an update on finding the Boston Marathon suspect.
CNBC's Scott Cohn reports on the latest details emerging in the investigation of the Boston bombings.
Awaiting news from the Boston area police who are on a manhunt for one of the bomber suspects.
Scott Stewart, former special agent at the U.S. State Department, discusses possible links between the bombing suspects and Al Qaeda.