One thing they won't likely encounter are citizens. Fear of protesters is the talk of grocery and bank lines. At one point, local media was filled with reports of surreptitious foreigners training in a vacant building (they turned out to be a Swedish punk band on tour).
Damn those Swedish punk rock terrorists and their "practicing for a tour" cover story.
So, I'm getting the impression that Americans are pretty much afraid of everything & everyone except the folk they should actually fear.
Kind of strange.