The Tsarnaev brothers, suspects in the Boston bombings, are ethnic Chechens, stemming from a tribal society in which a code of honor and revenge plays a major role. As questions turn to motive, this code may be far more relevant than the brothers' views of Islam.
Jared Lee Loughner was found competent Tuesday to stand trial and pled guilty to 19 counts, including murder, for the January 2011 shooting in Tucson in which six people were killed and 13 wounded – including then-Rep. Gabrielle Giffords (D) of Arizona. In mass shootings like this where the perpetrator was not killed during the rampage, here’s how the cases have been resolved.
Al Qaeda in the Arabian Peninsula's second underwear bomb plot went nowhere thanks to great intelligence work. But this is a case where too much disclosure is a problem.
Civil libertarians and some constitutional scholars say the targeted assassination of US citizens like Anwar al-Awlaki – even in war time – cannot be justified. The Obama administration says it's a matter of necessary self defense against terrorist attacks.