TSA doesn't even know if its' bomb scanners are working
So, for over a decade now, the TSA has been slowing people down, sexually harassing them, taking pictures of them in the nude with advanced technology that may cause cancer, and violating the Fourth Amendment... in return for precisely zero benefit in safety because the machines don't work.
When I started writing this post, I was going to object to this idea that American lives may be at risk because the bomb-detecting machines aren't working properly to detect bombs, and thus a terrorist attack might cost lives. The truth is that the TSA bomb-detecting machines have never stopped a terrorist attack. Every failed terrorist attack, including such famous incidents as the underwear bomber and the shoe bomber, got on the plane successfully.