CAMP DAVID TFR TO EXPAND THIS WEEKEND Pilots flying in the Mid-Atlantic area are cautioned that the temporary flight restriction (TFR) area centered on Prohibited Area P-40, the presidential retreat at Camp David, Maryland, will grow larger this weekend. The TFR will extend to a 10-nm radius below 18,000 feet beginning at 3 p.m. local on Friday, April 16, and continuing through 3 p.m. local on Sunday, April 18. During that time, the notam prohibits practice instrument approaches within the TFR. All operations (except military, law enforcement, and air ambulance) are prohibited within 5 nm below 12,500 feet. Between 5 nm and 10 nm, aircraft must be on an active IFR or VFR flight plan with a discrete transponder code assigned by air traffic control and must maintain radio contact with ATC. All such flights must be for ingress, egress, or transit only. No flight training, aerobatic, glider, parachute, hang gliding, ultralight, aerial application, or animal control operations are permitted. Also, al aircraft departing from private airports are required be on a heading away from the center of P-40. See AOPA Online for the full text of the notam ( http://www.aopa.org/whatsnew/notams.html#4/3235 ). Because TFR airspace frequently changes, AOPA strongly encourages pilots to obtain a briefing and CHECK NOTAMS before every flight. TFR violators will be intercepted and forced to land.