- Family: Atlas
- Length: 20.27 m
- Diameter: 3.05 m
- Launch Mass: 130 T
The Atlas LV-3 Agena B was manufactured by United States Air Force with the first launch on . Atlas LV-3 Agena B has 21 successful launches and 8 failed launches with a total of 29 launches. The Atlas LV-3A was a largely unsuccessful configuration until it was given an Agena B upper stage. It was responsible for the launch of Mariner II to Venus and had one of the first engines that could be restarted in orbit.
United States Air Force is a Government USA entity that was founded in and is administered by .
United States Air Force has 972 successful launches and 106 failed launches with a total of 1078 launches.