Funny story, so in 2008 I was admitted as a refugee. I flew from Amman, Jordan and landed in Chicago. Everyone that had an IOM bag had to go to a designated area to get their fingerprints taken. So when it was my turn, the officer took my index fingerprint, waited a few seconds then gave me a look, a WTF look, but didn't say anything. A couple of minutes later, two homeland security officers showed up out of nowhere and escorted me to a holding area. I wanted to find out what was going on because I was the only one out of the entire group (100 people or so) that was getting this special treatment, but the officers ignored me. I waited, and waited, and waited, then when I asked again ~ four hours later I was told "Don't worry, you're going in either way". Long story short, The FBI had a record on me because I was a translator for the US Army in Baghdad, but the record didn't say whether I was one of the good guys or the bad guys, so they had to contact the FBI to see what's up. Fun times..