Seems to me that TSA has bought a bunch of expensive gear none of which seem capable of reliably detecting explosives.

Billions of dollars on Strip Search Machines that do not discriminate on detecting dangerous things, untold amounts of money on Explosive Test Devices that from all accounts detect many things including some drugs and baby food but do not reliably detect explosives and the magical Behavior Detection Officers that apparently detect nothing.

So the only tool TSA has that actually works is the old fashioned metal detectors and TSA inherited those devices from the prior screening companies.

Are we really any safer with TSA Airport Screening?