USA Today reports that Department of Homeland Security agents tested 450 airports' security checkpoints over 20,000 times between 2002 and 2007, but in cases where they were able to sneak contraband past the screeners, didn't investigate the breach:
A government program to find gaps in airport screening is "a waste of money" because it doesn't follow up on why screeners failed to spot guns, knives and bombs on undercover agents, the head of the House Homeland Security Committee says….
House Homeland Security Committee Chairman Bennie Thompson, D-Miss., plans a hearing next month to press the TSA on making better use of covert tests.
"You have a system that's supposed to strengthen airport security, but you don't use the results of the tests to do exactly what you're doing the tests for," Thompson said. "It's obviously a waste of money."
The TSA (which is under the purview of DHS) fired back that it has too "adopted many new screening practices and technologies to close holes revealed by testing." And just how did the TSA do this without anyone investigating or taking notes? Well, that's a secret, and they crossed their hearts that they wouldn't tell.
More TSA invective here.