Travelling to the US around 2005 or so - a friend got whisked away into an interrogation room without any explaon entering the country. He'd been part of the NA

Travelling to the US around 2005 or so - a friend got whisked away into an interrogation room without any explaon entering the country. He'd been part of the NATO forces preparing for/participating the gulf I war - and they similarly spent some hours before letting him go with a "thank you for your service". Apparently they readily knew he'd been "in the wrong place at the right time", but took some time to figure out which "side" he'd been on..