Perhaps. In the past two months, I've had pat-downs in DCA, BWI, and PHI (my home airport, SYR, doesn't have scanners, so there's nothing to opt out of). They

Perhaps. In the past two months, I've had pat-downs in DCA, BWI, and PHI (my home airport, SYR, doesn't have scanners, so there's nothing to opt out of). They all use machines similar to this one: http://www.tsa.gov/sites/default/files/images/edt_closeup.jpg http://www.tsa.gov/sites/default/files/images/edt_closeup.jp... I've never seen a failure myself (the green bar you see pops up after a few seconds), but according to a friend who has, a red bar pops up instead.