Eh? But he wasn't caught due to airport security. He got onto the plane and tried to set off the bomb during the flight.
He would have been caught if someone had looked at his shoes.
But anyway - the point was 'general escalation of security in airports which caught the Richard Reid' is a provably false statement.
http://edition.cnn.com/2009/WORLD/meast/09/30/saudi.arabia.a...
Are you familiar with any recent bomber story at all? All he needed was some matches and a small amount of plastique.
Someone put an incendiary in his underwear. There are tons of possibilities. If you can't name 3 ways other than shoes and underwear, you might be in the group that thinks the TSA is fine.
I have often noticed policies are different at each airport. Combined with the shoe/belt/imaging policies, I believe it's meant to be a form of confusion. As in, any given security policy/process can be studied for weaknesses. When the policies are differing/changing there is a component of surprise the attacker has to account for that can be difficult to game. However, this is all in my head as I try to understand my observations. Hoping it's all being done intentionally, when chances are it's just local level enforcement picking and choosing what ever they want to enforce any given day depending on who is in charge on that shift.