IWST test flight - .
Apogee: 520 km (320 mi). The first Thor IRBM to be fired by a Royal Air Force (RAF) crew was launched from Vandenberg AFB. Integrated Weapon System Training 1. First Thor IRBM launched by British crew at Vandenberg AFB..
Combat training launch - .
Apogee: 520 km (320 mi). A Royal Air Force crew launched the 22d and last operational test Thor IRBM (PGM-17A) from Vandenberg AFB. First launch and first missile was fired from Vandenberg AFB on 16 December 1958.