U.S. officials tell Fox News exclusively that a North Carolina man is the latest American citizen to show connections with Anwar al-Awlaki, the radical Muslim cleric linked to the Fort Hood shooting, the attempted Christmas Day bombing and the failed attack on Times Square.

Officials say American Samir Khan is in Yemen, and “it is safe to conclude [Awlaki’s and Khan's] paths have crossed.”

Khan, who began a radical blog in his early 20s from his parents’ basement, is now being investigated by the FBI.  Fox has learned that at least six people in North Carolina have been interviewed as part of the investigation. 

U.S. officials say it is likely Khan was a key player behind al Qaeda’s new English-language magazine called “Inspire,” which instructs recruits on how to build  homemade bombs.   Khan’s old website and blog, with its clean crisp graphics, sources say, was strikingly similar to the magazine.

Congresswoman Sue Myrick, R-N.C., who has followed Khan’s activities since 2007, has called for Khan’s American citizenship to be stripped.  She is openly questioning why the U.S. intelligence community has not been more aggressive in its pursuit of Khan.