Air traffic controllers lost contact shortly after takeoff with the pilot of a light plane that caused a security scare on Sunday when it flew over heavily restricted airspace near Washington, authorities said on Monday.
Four people including the pilot of the Cessna Citation 560 were killed in the crash, the Federal Aviation Administration (FAA) said. The Department of Defense scrambled F-16 fighter jets, which created a sonic boom over the U.S. capital as they pursued the Cessna.
