This does not inspire confidence:
Illegal immigrants threw rocks at a Border Patrol helicopter, forcing the pilot to make an emergency landing when one of the rocks damaged the rotor, the agency said.
Neither the pilot nor the Border Patrol observer was injured.
The A-Star helicopter was two miles west of the U.S. Port of Entry in Andrade, Calif., on Tuesday when a group of immigrants began throwing rocks at the aircraft.
I think helicopters are fascinating, and have flown in them numerous times, but I don’t think most people know how easy it is to bring them down. I know some people who swear that helicopters are the one machine out there that actively fights you when you use it as designed.