Israel has been doing behavior profiling beginning at the moment you get out of your car at the airport, and run one of the most secure airports in the world. Even though the word profiling has a bad connotation in the USA, it works.
Supposedly the Patriot Missile was protecting Israel during the first Gulf War, but there are as far as I know zero confirmed hits (IIRC the Pentagon generously thinks that a few scuds were deflected, but Israel thinks otherwise).
The point is that just because a program is thought of as 'famously effective' doesn't mean it actually is.
http://www.slate.com/articles/news_and_politics/explainer/20...