Someday, people will come to realize that there was one single change after 9/11 that effectively eliminated the possibility that hijackers could use our planes to fly into targets - they put locks on the cockpit doors.
Everything else is a charade. The TSA was created and is funded specifically to allow politicians to brag that they "created jobs", even if those jobs are completely worthless and nothing more than "security theater". It's a federal work program, nothing more. You might as well named it the "Ditch Digging Administration" and put the same low income, low skill workers in fields digging ditches and filling them back in. At least that would have some tangible benefit and stop causing so many people the nuisance.
In fact, the privacy invasions, delays, and "no fly lists" put in place by the TSA have caused significantly more deaths than happends on 9/11 - because people avoid the airports more and drive... getting into highway accidents.