U.S. Hunts Devious Al Qaeda Bomb Maker's Proteges
By BRIAN ROSS (@brianross) and JAMES GORDON MEEK (@meekwire) ASPEN
July 19, 2013
Al Qaeda's most diabolical bomb maker, who has targeted the American
homeland at least four times, has trained other terrorists who are now being
hunted down, the top U.S. aviation security official said today.
Transportation Security Administrator John Pistole told ABC News during a
discussion at a counterterrorism conference that accused Saudi terrorist
Ibrahim al-Asiri had shared his expertise at building almost undetectable
bombs with a number of al Qaeda operatives.
"There is intel that he has unfortunately trained others," Pistole said at
the annual Aspen Security Forum.
Asiri, 31, created two versions of an improvised explosive device hidden in
men's underwear, with which the Yemen-based al Qaeda affiliate al Qaeda in
the Arabian Peninsula (AQAP) almost succeeded in blowing up a passenger jet
over Detroit on Christmas Day 2009. A "new and improved" version was
obtained by spy agencies last year.
Pistole said that "there is a lot of effort to identify" those to whom Asiri
has taught his terror tradecraft, particularly after similar liquid
explosives bombs were discovered aboard U.S.-bound cargo jets in 2010.
However, "talent is not always transferable," a U.S. counterterrorism
official told ABC News recently, meaning that Asiri's skills as a bomb
innovator are considered unique.
Pistole also for the first time detailed the sophisticated "Underwear Bomb
II," which a double-agent stole from AQAP in 2012 after the group dispatched
him as a suicide bomber aboard an aircraft. ABC News obtained a Department
of Homeland Security illustration of the newer bomb. Pistole called the U.S.
ally-led operation an "intelligence coup," because it enabled western
counterterrorism services to thwart a serious threat from a bomb almost
impossible to detect by magnetometers and advanced imaging machines at
"It was a new type of explosive we had never seen," which used two redundant
initiators filled with liquid explosives to detonate a larger liquid
explosive charge in men's briefs, Pistole said.
"He encased this explosive in caulk -- kitchen caulk," he explained, to
conceal the scent of he explosives and "evade bomb sniffing dogs."
It "possibly" could have been detected by TSA, but that would be less likely
in overseas airports, where security screening isn't always as precise as it
is inside the U.S., Pistole added.
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