PHOTOS: Scene of plane crash that killed 7

PHILADELPHIA -- An airport employee watched as the Gulfstream jet raced past the end of a runway, plunged down an embankment and erupted in flames.

The witness account of the Saturday night crash that killed all seven people aboard, including Philadelphia Inquirer co-owner Lewis Katz, provided some of the first clues as investigators began piecing together what went wrong during the attempted takeoff from a runway surrounded by woods outside Boston.