In London, Peter Clarke, the head of the counterterrorism branch of the metropolitan police, suggested that the group had not yet constructed its bombs. \ufffdThe intelligence suggested that the devices were to be constructed in the United Kingdom and taken through British airports,\ufffd\ufffd he told reporters.
Aviation experts have long known that planes could be vulnerable to explosive devices put together on board or from hazardous liquids, said Robert W. Mann Jr., an industry consultant based in Port Washington, N.Y.
\ufffdYes, it could have happened,\ufffd\ufffd he said.
Emphasis added.
One reason I'm skeptical, no one had any bombs yet? Not even a trial version? A POC?
And Liebermann just lost....hmm.