First successful launch of an American V-2 rocket at White Sands Proving Ground.

The V2, with the technical name Aggregat-4 (A4), was the world's first long-range guided ballistic missile. The missile, powered by a liquid-propellant rocket engine, was developed during the Second World War in Nazi Germany as a "vengeance weapon" and assigned to attack Allied cities as retaliation for the Allied bombings of German cities. The V2 rocket also became the first artificial object to travel into space by crossing the Kármán line with the vertical launch of MW 18014 on 20 June 1944.

White Sands Missile Range (WSMR) is a United States Army military testing area and firing range located in the US state of New Mexico. The range was originally established in 1941 as the Alamogordo Bombing and Gunnery Range, where the Trinity test site lay at the northern end of the Range, in Socorro County near the towns of Carrizozo and San Antonio. It then became the White Sands Proving Ground on 9 July 1945.

May 10 is the 130th day of the year in the Gregorian calendar; 235 days remain until the end of the year.