You'd think pilots would get the idea by now.
Two small aircraft wandered into Camp David airspace on Saturday. F-15 fighter jets under NORAD command scrambled and escorted the plane out of the protected space.
President Obama is spending part of the weekend out at Camp David.
A similar incident took place last week and the week prior, marking this the third and fourth such incidents.
After questioning at a nearby airfield, it was determined the pilot had merely made a navigational error.
