Other nations also bought both new and used 707s for military service, primarily as VIP or tanker transports.
In addition, the 707 served as the basis for several specialized versions, such as the E-3 Sentry AWACS aircraft.
US Air Force procurement of the Boeing 707 was very limited, amounting to three Model 707-153s designated VC-137A.
[1] To supplement its VC-137s, the USAF converted several C-135 airframes to VC-135 VIP standard, and these were used for staff transport mainly within the United States.
The USAF purchased a number of 707s under the C-137 series of designations: The following aircraft are on public display: General characteristics Performance