WASHINGTON -- With al-Qaida militants surging in the Middle East and North Africa, U.S. law enforcement officials are increasingly concerned about efforts to recruit and radicalize American citizens by drawing them to the region and sending them back to this country to carry out attacks.
FBI director James Comey calls the threat one of the bureau's top priorities and said the agency is working to identify and track U.S. residents who travel overseas, embrace al-Qaida ideology and return to the United States.
"We are focused on trying to figure out what our people are up to, who should be spoken to, who should be followed, who should be charged," Mr. Comey said in a recent meeting with reporters. "It's something we are intensely focused on."
Rep. Michael McCaul, R-Texas, chairman of the House Homeland Security Committee, said al-Qaida, which has turned into a number of splinter groups, is just as ominous a threat as it was on Sept. 11, 2001. "Al-Qaida is not on the run, but is in fact growing in strength at an alarming rate across the Middle East and North Africa," he said at a committee hearing last week.
Two cases of radicalized Americans surfaced last year.
Nicole Lynn Mansfield, a nurse from Flint, Mich., died in May while fighting alongside anti-government militants in northern Syria. She reportedly tossed a grenade from a passing car at Syrian government soldiers, who then opened fire on the vehicle.
Mansfield, 33, was still carrying her Michigan driver's license. Also found in her vehicle was a banner for one of the al-Qaida-linked rebel fronts fighting in Syria. She had married a man from Dubai and converted to Islam.
The other is Eric Harroun, a former U.S. Army private from Tucson, Ariz., who pleaded guilty in September to conspiracy to violate arms-control laws after fighting in Syria alongside al-Nusra Front, a branch of al-Qaida that the U.S. has designated a terrorist organization.
He initially faced a sentence of up to 30 years for firing a rocket-propelled grenade during a clash in Syria. He was arrested in March and then released upon his guilty plea in September, having served six months in jail.
Two others in recent years were radicalized in Pakistan and then returned to the U.S. and came dangerously close to carrying out bombings in New York City. Najibullah Zazi, an Afghan-American, schemed to blow up the subway with backpack bombs, and Faisal Shahzad, an American born in Pakistan, attempted to detonate a car bomb in Manhattan's Times Square.