I was going to write about the failed Oregon bombing plot and how the TSA would be powerless to stop it with its scanners and pat-downs for it was a domestic plot that was to use cars and such. Then, I saw this gem of an article (Mike Masnick, TechDirt) saying that the FBI helped the would-be bomber throughout the process and then arrested him just to bolster its own reputation. It links to many different other articles (which I will leave you to read on your own) that talk about this as well as similar fabricated plots.
There really isn't a whole lot to say here, except "what?" This really does give a whole new meaning to "security theater" — now complete with actors and a set!