Mysterious Al-Qaeda Terrorist, Adam Gadahn Killed By U.S. Drone Attack:

http://mobile.reuters.com/article/topNews/idUSKBN0NE1MI20150424?irpc=932

Who Is Winchester, Californian, Al-Qaeda's Gadahn?

http://www.cnn.com/2013/03/23/us/adam-gadahn-fast-facts/

I find these factors unsurprising about Gadahn:

-Survivalist upbringing on a farm with radicalized Christians, Jewish, and Islamist terrorists

-Weapons running seems to have been his forte, to lone wolf, Al-Qaeda jihadists

-He had extensive Al-Qaeda connections from Orange County, California, possibly before age 18.