Fighters scrambled as DC airspace rules violated - CNN.com

Two F-16 fighter jets briefly took to the sky over Washington on Monday after a small passenger aircraft violated the capital's airspace restrictions, according to military officials. A portion of the White House grounds was briefly evacuated during the incident. The passenger plane -- a Cessna 182 -- was intercepted
by the F-16s at 2:19 p.m. EST, a statement from the North American Aerospace Defense Command noted. The plane was escorted to an airport in nearby Manassas, Virginia, where it landed at 2:32 p.m. EST. The Cessna pilot was a student pilot who initially took off from Warrenton, Virginia, the Federal Aviation Administration confirmed.
The Secret Service will interview the pilot, a spokesman for the agency told CNN."

Source: http://www.cnn.com/2010/US/11/22/dc.airspace.violated/index.html