Not at All Terrible
According to Fox News, a terrorist leader blew himself up:
In a related story, in the article “Build Your Own A-Bomb And Wake Up The Neighborhood” by George W. Harper (in the April 1979 issue of Analog), we find:
A man whom the U.S. described as a key figure in Al Qaeda in the Arabian Peninsula accidentally blew himself up, U.S. military officials told Fox News.
The officials say Nayif Al-Qahtani was "messing with a bomb" when it went off. U.S. officials had been watching him, but Fox News' sources insist the U.S. had nothing to do with his death.
Terrorists who blow up only themselves are merely amusing and not at all terrible.
Addendum: A blurb at Fark was far more succinct: