Adam Gadahn, also known as Azzam al-Amriki, is an American who grew up in Southern California, converted to Islam and joined al-Qaida. Here he speaks in a 106-minute-long video released Sept. 22, 2009.
IntelCenter via AP
In 2003, Samir Khan launched a popular al-Qaida website from the basement of his parents' home in Charlotte, N.C. Today, he is believed to be behind an English-language al-Qaida magazine that reads like a glossy American publication -- except its topic is terrorism.
Screen grab via YouTube/WJZY/WBTV
Adnan Shukrijumah, shown here in undated photos from an FBI alert issued in March 2003, is believed to be the highest-ranking American in al-Qaida. He grew up in Florida and poses a new challenge to law enforcement: a terrorist who is not only familiar with the United States but deeply understands it.