A suspected al-Qaida operative who lived for more than 15 years in the U.S. has become chief of the terror network's global operations, the FBI says, marking the first time a leader so intimately familiar with American society has been placed in charge of planning attacks.

Adnan Shukrijumah, 35, has taken over a position once held by 9/11 mastermind Khalid Sheikh Mohammed, who was captured in 2003, Miami-based FBI counterterrorism agent Brian LeBlanc told The Associated Press in an exclusive interview. That puts him in regular contact with al-Qaida's senior leadership, including Osama bin Laden, LeBlanc said.