On September 11, 2011, this happened:
Someone shouted for us to place our hands on the seats in front of us, heads down. The cops ran down the aisle, stopped at my row and yelled at the three of us to get up. “Can I bring my phone?” I asked, of course. What a cliffhanger for my Twitter followers! No, one of the cops said, grabbing my arm a little harder than I would have liked. He slapped metal cuffs on my wrists and pushed me off the plane. The three of us, two Indian men living in the Detroit metro area, and me, a half-Arab, half-Jewish housewife living in suburban Ohio, were being detained.
One of the cops in the story mentions that there were about 50 such incidents across the States that day.