I had a somewhat similar experience the day shellshock was announced on a layover in Atlanta flying between two different universities. I had been browsing the news and coding for maybe an hour after dinner at the battery-charging station in my completely empty terminal, and three clean-cut men in their late thirties sat down on all sides of me and started joking about how I was in trouble.

Long story short, after a few minutes of awkward chit chat where they repeatedly try to determine whether I "believed in absolutes", they let me know that, yes, they were "professional interrogators". They then all immediately got up and left for what they claimed was their flight to Minneapolis.