Some more planned fighter jet training exercises will take place over D.C.’s restricted airspace on Wednesday. NORAD has scheduled two Civil Air Patrol Cessnas, two Air Force F-16s and a Coast Guard helicopter to train between midnight and 6 a.m. overnight, plus a second daytime exercise between 11 a.m. to 2 p.m. on Wednesday, which will include one Lear jet, one Cessna and one F-16. The exercises are designed to simulate various situations in which aircraft enter restricted air space.