F-16's sonic boom heard over DC area in response to unresponsive plane

Officials attempted to establish contact with the pilot of the unresponsive plane, but they were unresponsive.
A sonic boom heard across Washington, D.C., on Sunday was the result of a fighter jet investigating an aircraft in a restricted area, according to U.S. officials.
An unresponsive business Cessna 560 Citation V plane was flying over D.C. and...