AAAHHH THE SKY IS FALLING AND OUR FREEDOMS ARE ALL GONE! QUICK ROBIN, TO THE STAR-SPANGLED-BANNER-MOBILE!
They were not "acting suspicious." They were moving about the cabin. Lots of passengers move about airline cabins, to get a better seat after the plane takes off (more room to lie down, or watch the movie), or to talk to someone. They also paid cash. The govt prints cash. If they don't want us to use it, they shouldn't print it.
AAAHHH THE SKY IS FALLING
That's exactly your reaction if you see a Muslim (gasp!) moving about the cabin (gasp, gasp!).
Get a grip. It's because of that panicky paranoid attitude that planes get turned around for no reason.
I know the State wants me to believe there are terrorists under my bed. I know many "conservatives" already see Muslims in their closets and under their beds. Well, I've yet to reach that point or paranoia. Sorry.