The idea is to have global standards. There is so much travel that if you just had a regional standard, it would probably ultimately have to be changed. – Gijs de Vries
Air travel survived decades of terrorism, including attacks which resulted in the deaths of everyone on the plane. It survived 9/11. Itll survive the next successful attack. The only real worry is that well scare ourselves into making air travel so onerous that we wont fly anymore. – Bruce Schneier