Karachi, Pakistan —In 2004, I began investigating Adam Gadahan in Southern California. He’d become a big news story following a captured American Taliban fighter, John Walker Lindh now doing serious federal prison time. I interviewed Gadahan's family members and people that knew him before he relocated to Pakistan. Gadahan grew up in a rural area of Riverside County, CA. Gadahan's father still owns the goat farm there. Gadahan became a Muslim joined a Mosque in Orange County where his hot temper got his a brush with the law. His assault on another Muslim at the Mosque resulted in his only known criminal record. Gadahan was vigorously defended by is aunt who first claimed that her nephew was not involved with al-Qaida but later suggested that he’s must have been brainwashed in Pakistan. One thing we know for sure Gadahn made videos that threatened his former country, tried to recruit Americans to join the al-Qaida terror campaign and pissed off a lot of Americans. He also...