Convicted 'Unabomber' Ted Kaczynski dead at 81

FILE PHOTO: Theodore Kaczynski is led out of federal court where he was charged with a single federal weapons violation April 4,1997.

(Fixes typo "1978 to 1995" in paragraph 4)

(Reuters) - Ted Kaczynski, former math professor and "twisted genius" who came to be known as the Unabomber when he carried out a 17-year spree of mysterious bombings that killed three people and baffled the FBI, died on Saturday at the age of 81.