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French jihadist David Drudgeon was one of the most active bombmakers with in the Khorasan group, sources tell CNN. Drudgeon was allegedly killed in a U.S. air strike Thursday morning.
His knowledge of explosives, European-background and access to Western fighters in Syria makes him arguably one of the most dangerous terrorists in the world.
His mission was apparently to create very small, non-metallic explosive devices that could be smuggled through airport security and onto a U.S.-bound plane, where it would be assembled to blow up the airplane.
Drudgeon was working on a variety of bombs, sources tell CNN, that could be easily disguised in everyday objects, such as cell phones and toothpaste tubes.
CNN's Pamela Brown reports.