Unresponsive plane causes chaos in DC airspace and Virginia crash.

F-16s were scrambled to investigate an unresponsive Cessna business jet that had entered restricted airspace over Washington, D.C. The Cessna subsequently crashed near the George Washington National Forest in southwest Virginia. There were four people aboard the Cessna that had originally taken off from Elizabethton, Tennessee, bound for Long Island MacArthur Airport in New York. The FAA and National Transportation Safety Board will investigate what led the Cessna to crash, with some aviation experts speculating that hypoxia may have incapacitated the pilot.