A deer is more likely to kill you than a terrorist. You’re more likely to die in a bathtub. The TSA has likely killed more people than terrorists have by causing people to drive instead of fly.
If there were active terrorist plots to take down airplanes in the U.S. the TSA wouldn’t do much to stop it since they have consistently failed to catch 90% – 96% of banned items going through checkpoints in tests over the last decade.