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New details are emerging about the type of device used in Monday's bombing in Boston, reports CNBC's Scott Cohn.
Investigators appear no closer to finding a suspect but are learning more about the bombs used, reports CNBC's Scott Cohn.
CNBC's Eamon Javers has the latest details on a ricin-laced letter sent to Sen. Wicker's office. And, Clark Ervin, former Homeland Security Department official; and Clint Van Zandt, former FBI profiler, discuss whether Monday's bombing leaves major events such as sporting, more vulnerable to future attacks.
CNBC's Scott Cohn reports the type of devices used in Monday's bombing in Boston are beginning to emerge.
Bomb fragments are being reconstructed at an FBI laboratory, reports CNBC's Scott Cohn. And, Philip Mudd, New America Foundation, discusses the psychological impact of terrorism and how to avoid copycat attacks.
CNBC's Eamon Javers has the latest details on a ricin-tainted envelope sent to the office of Sen. Roger Wicker (R-MI). Sen. Jack Reed (D-RI) and Sen. Angus King (I-ME) discuss a poison-laced letter sent to Capitol Hill, as well the Boston Marathon bombings.
A ricin-tainted envelope was sent to the Capitol Hill office of Sen. Roger Wicker, (R-MI), reports CNBC's Eamon Javers.
CNBC's Scott Cohn reports the FBI and state and local law officials are intensifying their probe into Monday's bombing at the Boston Marathon, recovering two pressure cookers packed with nails and other metals.
CNBC's Ross Westgate reports on the huge security operation ahead of the funeral of former UK Prime Minister Baroness Thatcher.
The latest on the terror events in Boston and how the nation's capital is responding, with CNBC's Eamon Javers.
CNBC's Bertha Coombs has the latest details on reopening of Boston's airport, as law enforcement officials continue to collect video from surveillance cameras and watch for a man seen leaving the scene after the blast.
Large events around the globe are affected by the tragic events in Boston, reports CNBC's Tom Mackenzie.
The "sort of attack" we saw in Boston, feels like the kind of attacks we've been seeing in the past 10 years or more, said, Stewart Baker, Steptoe and Johnson partner. "We are going to find these folks, the Bureau is really good at dealing with this kind of evidence and crime scene," he added.