What needs to change ... simple:
1) Arm the pilots and teach them to defend the flight deck
2) Train the air crews in basic hand to hand combat (Krav Maga or Chin Na or something similar would be a good start)
3) Add bomb sniffing dogs to the screening area for both people and for baggage
4) Profile based upon unusual behaviour like buying a one way ticket with cash
5) Regularly put air marshals on flights or allow airlines to hire their own private armed security officers
6) Return to metal detectors for the vast majority of passengers
7) Save the more invasive scanners and pat downs for people that meet the profile of a terrorist.
Arm the passengers. Deport the Muslim. Profile them and root them out. Cancel the TSA and IRS and Protect our Borders. Eliminate the useless Homeland Security. Empower the FBI to go get em.
8. Set up a plan where business travelers who fly a certain number of miles per month can apply for a background check and get a waiver for six months at a time to bypass all this BS abnd just make it past the metal detector
Can't do that. Muslim travelers would be offended.