My Experience With A U.S. Customs Secondary Screening

I flew into Baltimore-Washington International airport in June of this year. After deboarding, I had to wait in line for an electronic kiosk to ask me questions I already answered on the paper U.S. Customs form I received on the airplane. The kiosk took a picture of me from what seemed like a one megapixel camera and printed out a slip that I had to give to the Customs agent. This time around, I noticed the slip had a gigantic X on it. I imagine they used a more subtle code in the past but th...