Officials: 9/11 Plotter Exaggerated Claims

Khalid Sheikh Mohammed's claims that he was responsible for dozens of successful, foiled and imagined attacks in the past 15 years relies on a loose definition of the word "responsible." Officials say the 9/11 mastermind was key to some plots but a bit player in others.

The 31 on his list range from the stunningly vicious suicide hijackings of Sept. 11, 2001, to others that current and former government officials say were more talk than concrete plans, such as a plot to kill Jimmy Carter and other former U.S. presidents.