FBI and SWAT teams are trying to locate a suspect in Monday's bombing at the Boston Marathon. The other suspect, his brother, was killed earlier in a shootout with police. Dr. David Schoenfeld of Beth Israel Hospital talks about Thursday night's police action in Watertown.
Explosions at the Boston Marathon, potentially ricin-laced letters intercepted en route to the White House and Sen. Roger Wicker, and an explosion at a fertilizer plant in Texas have each prompted investigations. In each case, authorities sift through evidence to construct a timeline of events.
Marathons are among the most open sporting events. Crowds can press right up against the route as runners wind there way through city streets. But two explosions at the Boston Marathon have raised questions about whether that openness can last.
The Special Agent in Charge of the FBI Boston office Rick DesLauriers hopes someone, somewhere heard something that will point to a suspect in the Boston Marathon attack. Three people were killed Monday in the attack.
The bombings at the Boston Marathon have lead to heightened security across the world. Organizers of the London Marathon contacted local police to discuss increased security measures. Officials in California monitored its emergency system after the blast.
Less than 24 hours after two explosions rocked the finish line at the Boston Marathon and there are still more questions than answers about what happened. Three people were killed and more than 170 were injured. The FBI is investigating the event as an act of terrorism.
Morning Edition co-hosts Steve Inskeep and David Greene discuss the investigation of Monday's Boston Marathon explosions with Roger Cressey, a former counterterrorism investigator and member of the National Security Council, and NPR's Dina Temple-Raston.
President Obama makes a statement about Monday's explosions at the Boston Marathon. Morning Edition co-hosts David Greene and Steve Inskeep speak to NPR reporters covering the story in Washington and Boston.
President Obama said the FBI is investigating Monday's twin bombings at the Boston Marathon "as an act of terrorism." Meanwhile, law enforcement officials are asking the public to submit photos and videos from the scene. And Boston Mayor Tom Menino said that as the city grieves the victims it is also proud of those who helped in the explosions' aftermath.