That's specious reasoning. I have a rock that keeps tiger away. How does it work? It doesn't, it's just a stupid rock. But I don't see any tigers around here, do you?

Yea they added flight deck doors that you can’t get through and a policy that the doors stay closed through a flight. The TSA did nothing to help, the planes are a hard target now.

Or the threat has subsided. Not saying get rid of security, but I think it’s okay to allow water bottles again.

> we have not had a plane blow up into buildings since, so something must be working

Yeah, 10 minutes after the event every person on earth now knows the best strategy is to rush the cockpit, not sit calmly and wait for the hijackers to ask for a ransom, which was the previous norm.

Between that and reinforced concrete doors flying planes into buildings is no longer a viable strategy.

Reinforced cockpit doors have backfired in pilot murder suicides on Germanwings 9525, LAM470, MH370, CES5735. It’s not the silver bullet..