A recent study published in the Journal of Transportation Security details how the "naked X-ray machines" being deployed at airports around the world don't detect explosives as well as might think.

I've included some links to news reports which detail the findings.

USA Today: Body scanners' effectiveness limited

KSL-TV Salt Lake City

Washington Post: More body scanners coming to an airport near you

Fox News

TPM Wire: Scanners Can Be Fooled with Pancakes

And, for those of you who watch "Comedy Central"...