Earlier quoted context omitted.
He didn't want to let his laptop out of his sight. I'd behave the same way given how important my work/data is to me.
Which is completely reasonable. But the fact their guidelines require his bag to be cleared before he could have it back does not mean he was "detained". There are some pretty goddamn good reasons why the bag of a dude who tests positive for explosives has to be cleared before he's given it and allowed to run around an airport full of people.
If so, there are some pretty good reason why, if they consider that threat even remotely real, they should clear the area.
A good indication that the actual terrorist threat is absolutely vanishingly small: If there were lots of terrorists around, one of the easiest targets these days that'd maximize the amount of terror, is airport security screening areas. If they get through, they could defuse the bomb and blow it up on a plane instead, if not, they could let it go off on a timer and take out both a lot of passengers and a lot of security people.