Six fighter jets were scrambled on the afternoon of June 4 to try to intercept the private Cessna jet, originally on a flight from Tennessee to New York, as it encroached on restricted airspace around Washington, D.C. The plane eventually went down in a mountainous area of Virginia, killing all four people on board.

The Cessna Citation pilot was "slumped over" controls when F-16 pilots intercepted the plane about 30 minutes before it crashed in Virginia, officials said.

Here's a timeline of events related to the flight and crash: Cessna Citation 560 (N611VG) takes off from Elizabethton Municipal Airport in Elizabethton, Tennessee, for Long Island's MacArthur Airport. Air traffic control loses communication during ascent.

The National Transportation Safety Board is leading the investigation. Officials were at the crash site Monday to begin “documenting the scene and examining the aircraft,” it said.

No survivors were found at the crash site of a plane whose pilot was unresponsive as it flew near the Washington, DC, area Sunday, prompting military fighter jets to attempt to intercept the aircraft before it ultimately crashed,

Investigators are looking into the cause of the plane crash in a remote area of Virginia on Sunday. The F-16 fighter jets that intercepted the plane could see that the pilot was slumped over and incapacitated,

A sonic boom startled residents across Washington and parts of Maryland and Virginia as fighters pursued an unresponsive plane on Sunday.