Al Qaeda-Supported Attack Disrupted
U.S. and Canada foil Al-Qaeda terrorist plot to derail New York to Toronto passenger train, two suspects arrested
Tsarnaev Formally Charged With WMD Use
NBC's Pete Williams breaks down charges brought against Boston Bombing suspect
Boston Attack Casts Shadow Over Immigration Debate
Senators clash at hearing over terror's impact on immigration reform
Williams: Carjacking Victim Called Bombing Suspects 'Cautious But Brutal'
Victim says he escaped Tsarnaev brothers at gas station, lived because he's not American