In 2015, agents with Department of Homeland Security posing as passengers snuck fake explosives through the security lines of several of the nation's busiest airports. During the test, TSA officers missed 67 of the 70 fake weapons that went through the checks — a failure rate of 95%
https://www.mercurynews.com/2019/12/20/whistleblower-says-tsa-is-trading-speed-for-security/