NBC's Jim Miklaszewski reports U.S. officials still don't know who launched the missile, pro-Russian rebels or Russian forces.» Read More
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.