Gadahn, who turned 28 Friday, grew up on a goat farm in rural Riverside County, where he and his three siblings were home-schooled by his parents. His father, Phil Gadahn, grew up in Orange County, the son of Dr. Carl K. Pearlman, a respected urologist and leader in the medical community from his arrival in 1949 until his death in 1998. In the mid-1990s, Adam Gadahn moved to his grandparents' home in Santa Ana. He found Islam on the Internet, converted at a mosque in Garden Grove and leaders there say he fell in with a group of Islamic fundamentalists....