On the night of September 11th, 1994 an airplane was allegedly stolen from a small airport near Aberdeen, Maryland and flown directly toward the White House and through the most protected airspace in the entire country. This plane was allegedly flown by a man who was drunk, and high on cocaine, and never completed his flight training.
The anti-aircraft system didn‘t work around the white house, and the plane, which had allegedly been on radar for 7 minutes was never reported to the secret service and no warning was given.