I would also refuse to pilot or fly in any small private aircraft the Clintons are traveling in.
The NextGen Air Traffic Control System mandates that commercial aircraft line up in narrow corridors during entry to airports. All one would need to know to take out a particular plane is the arrival time and the airline. They know where it will be. With over 10,000 ManPADs on the loose and borders a course sieve, there's nothing to it.