Al Qaeda in the Arabian Peninsula

The group, whose power and reach have diminished in recent years, did not give a cause of death for Khaled Batarfi, who once fought alongside the Taliban.

The terrorist network has lost eight of its top leaders in recent years. But it has more total fighters than it did on Sept. 11, 2001.

Following Freedom of Information Act lawsuits, the Obama administration released a 2010 Justice Department memo signing off on killing Anwar Al-Awlaki, an American citizen, without a trial.

The decision on a case at the Guantánamo war court did not resolve the broader issue of whether prosecutors can use evidence obtained through torture.

Lawyers paid by the Pentagon pursued the appeal on behalf of the released prisoner even as the State Department had a $4 million bounty out for him.

The gunman who killed three in Florida was not directed by Al Qaeda, nor inspired solely by online ideology. He was a new kind of terrorist, harder to spot: an extremely enterprising freelancer.

Where’s the Republican uproar over what’s gone on under his watch?

The gunman in December’s shooting, a Saudi cadet who had trained with the U.S. military, had been in contact with the terrorist group, officials said.

The death of Qassim al-Rimi is part of a string of setbacks that have damaged the group’s ability to carry out operations against the West.

In an audiotape message, Al Qaeda’s leader in Yemen claimed responsibility for the December attack that killed three U.S. sailors. The militant himself was most likely killed in a drone strike after he made the tape.