@Emjay
the TSA has admitted they've never caught a terrorist. They've admitted they miss 80% of all explosives & guns sent through in tests. I personally know a person who accidentally flew with a firearm in their carryon and it was never found. I had a credit card multitool in my bag given to me at a conference. I flew weekly for 6 months before they found it. I didnt even remember having it.
If a terrorist was serious about getting something on an airplane they could. I worked with the TSA for 6 years supporting IT security. I've been in meetings with their security officers. They are a joke on ego trips.
They ARE serious about it. They HAVE tried. They are dedicated to accomplishing the very thing you dismiss. You clearly have no access to real intelligence information...if you did, you know that your bolded assertion above is pure fiction. Apparently, being an IT desk guy does not relate to operational security in any way. I've been in a number of intel briefs that would make your blood run cold...its just sickening to see this casual "they aren't trying to get onto our aircraft" attitude, because its the ultimate in smug ignorance (as in ignorance of terror ops and terrorist intentions).
And just so you know, the goal is not to catch a terrorist...its to deter them and to make potential operations to difficult to pull off. As we've not had a single successful attack from a US Airport since 9/11, this goal has been met...against all expectations, US air travel has remained safe whilst travel from European and African airports has been marred by successful attacks.