Earlier this year, the Department of Homeland Security conducted an undercover test of the TSA, attempting to smuggle through fake explosives and banned weapons through the TSA. And the TSA’s success rate there? Only during three of the seventy attempts were they successful in finding the explosives or banned weapons – a 96% failure rate.
Such a model is already present in Israel and various European nations. Domestically, San Francisco International airport uses private screeners, and with much success. A 2007 study (by the TSA, by the way) found that private screeners were twice as effective at detecting fake bombs as TSA screeners. Private screeners also worked faster – processing 165 passengers for every 100 the TSA could.