American airport security was a "Connected Crime" scam before 9-11; and a very profitable one, at that. Huge cashflow - low overhead.
In the year prior to 9-11, the American security companies were merged into three, then sold to European investors at a discount; implying a foreknowledge of 9-11.
As it now stands, American airport security is programmed to go back to private hands in 3 years; per the American Nazi-like "Patriot Act."
The scammed American "Homeland Security Act" (complementing the "Patriot Act") provides the funding for the alleged airport security.
For those who don't know the story, the original "Homeland Security" law was known as H.R. 5005, containing 230 pages. In the background was H.R. 5710, containing 484 pages. The difference was billions of dollars in corporate "pork."
At the last second, the numbers on the two bills were switched; the "pork" version was passed. The White House advertised only the smaller of the two bills. Thus, an example of neo-American corruption.
For a decent account on American Airport Security, see:
http://home.attbi.com/~skydrifter/asn.htm
Look toward the bottom of the page for the "9-11 REDUX" account. It's quite interesting. Especially when you note that no viable measures are being taken, as opposed to the obvious sabotage of 'government' security, versus "privatised."