Originally Posted by
scubadiver
When they X-rayed it showed.
...whereas if you'd had the clip on your body somewhere when you went through a backscatter Nude-O-Scope, you'd have a pretty good chance of making it through the checkpoint with a loaded clip.
Recent press has made it pretty clear that the majority of "good finds" on the TSA's part have been by using the same methods as pre-9/11 screenings.