From The Washington Post:

The Transportation Security Administration offers a simple bargain: It demands our shoes, belts, wallets, time and, in some cases, dignity in return for it making air travel safer. But there’s reason to wonder whether the TSA is keeping up its end of the bargain. ABC News disclosed that undercover government investigators routinely penetrated TSA security with weapons and mock explosives in recent sting operations. According to ABC, undercover investigators slipped past TSA security checkpoints an astounding 67 of 70 times with items that should have set off alarm bells.