Joe Lieberman testified in Congress that better coordination between federal and local law enforcement or a tip to police from someone who knew of Tamerlan Tsarnaev's views could have prevented the bombing.
Just days after the Boston Marathon bombing, the political maneuvering and blaming have begun. Some lawmakers fault the FBI for not following up on intelligence about one of the alleged bombers. Others want to prosecute the surviving suspect as an enemy combatant.
Boston bombing case takes a dramatic turn overnight, involving a firefight and car chase into neighboring Watertown, Mass. One suspect is dead; No. 2 is at large. Several suburbs are on lockdown Friday morning.
Investigators have scoured the crime scene of the Boston Marathon bombing for every possible physical clue. A crucial task is to collect as many bomb fragments as possible, to track where the parts came from and who bought such items.