[Movemout]

I am also leaning to the ME sleeper cell theory. AK-74s are not a common long gun in the USA but are common in Arab militaries. It looks like a team of four is at work and multiple person nutcases working together are rare as well. Well, it was bound to happen sooner or later. Welcome to the future.

[livius]

I have a hazy recollection of somebody from the Middle East being arrested recently, possibly in Europe, attempting to board a plane with one of these weapons disassembled in his luggage. Maybe I'm just imagining it, though, because I can't recall the details. Anyone?

[OldEagle]

????"a team of four" ????

Could they be our elusive medical students????