Terrorism, Extremist | featured news

The F.B.I. and the C.I.A. separately had Tamerlan Tsarnaev, the suspect who died last week, listed in government databases in 2011, though they cleared him of extremist links.

Five young American Muslims were convicted of plotting terrorist attacks and sentenced to 10 years in jail Thursday in a case that highlights concerns about Westerners traveling to Pakistan to link up with al-Qaida and other extremist groups...

At hearings on Thursday, some Senators characterized the suspect as a homegrown extremist who slipped past law enforcement and military authorities.

A man who idolized American-born Taliban soldier John Walker Lindh and a Jordanian national who frequented extremist websites ...