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"What people don't understand is that I've been suffering from depression lately," he explained. "It stems from something I've never revealed because of my own shame --the fact that I was abused by my step-father as a child." Al-Zawahri said that he is writing a "tell all" book that will "place all the killing in its proper perspective, but I don't want to give too much away or no one will buy it." One teaser he shared: it was only last year that he finally got over his mother's death which occurred when he was twelve years old.
Al-Qaida has claimed responsibility for the Sept. 11 attacks that killed nearly 3,000 people in New York and Washington in 2001.
"I think if people knew the dark place I was in during that period of time in September 2001, they wouldn't be so quick to judge me," al-Zawahri explained. "Depression, it's the Persian Gulf's silent killer."