Within a few moments, I was met by another uniformed agent, who directed me to a glass-enclosed cubicle located between the screening belts for the B gates at BWI. On my way to the cubicle, I had observed a sign indicating that travelers have the right to decline the imaging machine and “request” a pat-down instead. It struck me as odd that in order to really see and absorb the information posted on the sign, you would have already passed by or through the imaging machine.
...

At this point, I turned to look over my shoulder and observed a Caucasian woman in her late thirties or early forties standing inside the whole-body imager. I called my screener’s attention to this and said. “Look over there. There’s a woman in the scanner. You all picked me for a search, and then the very next person you select is a woman. Why didn’t you pick a white guy? Where are all the white guys?”

She replied, helpfully, “We are understaffed today and we don’t have enough male screeners to do pat downs. We are not allowed to do opposite sex pat-downs so we are only selecting women for secondary screening.”

By this point, I was seated and she was patting down the bottom of my feet. The secondary search, more thorough than the last search I had been subjected to in Albany, but equally ineffective, was nearing completion. I said “If you are only selecting women, how is that random?”

She said, “You’re done. You can collect your belongings, Have a nice day.”