Martin NBS-1 (MB-2) crash, Jul 10, 1921 (5 killed), Mound...
Martin NBS-1 (MB-2) accident on July 10, 1921 near Moundsville West Virginia, United States with 5 fatalities.
- Date: July 10, 1921
- Aircraft: Martin NBS-1 (MB-2)
- Location: Moundsville West Virginia, United States
- Fatalities: 5
- Phase of flight: Takeoff and climb
A United States Army Air Service Martin bomber taking off from Langin Field at Moundsville, West Virginia, on 10 July 1921 crashed among spectators. Burning fuel spread over people and automobiles, and five spectators were killed while many others were injured.