Virginia Plane Crash Investigation Raises Questions About Pilot's Condition and Flight Path.

The pilot of a business jet that crashed in a remote part of Virginia appeared to be unresponsive, according to fighter pilots who intercepted the flight. The New York-bound plane took an erratic flight path, prompting the military to scramble fighter jets, causing a sonic boom heard in Washington, Maryland, and Virginia. The plane's owner said his daughter and 2-year-old granddaughter were aboard. Investigators will look at when the pilot became unresponsive and why the aircraft flew the path it did. The wreckage is "highly fragmented," and investigators expect to be on the scene for at least three to four days.