The first flight of the Boeing Delta III ends in disaster 75 seconds after liftoff, resulting in the loss of the Galaxy X communications satellite.

Delta III was an expendable launch vehicle made by McDonnell Douglas. Development was canceled before the vehicle became operational. The vehicle is the third generation of the Delta rocket family, developed from the highly successful Delta II to help meet the launch demand of larger satellites. While the Delta III never had a successful launch, some of the technologies developed were used in its successor, the Delta IV.