Launch Complex 18 (LC-18) is a launch complex at the Cape Canaveral Air Force Station, Florida that was active during the late 1950s and early 1960s. It was used by Viking, Vanguard, Thor and Scout rockets. The complex consists of two launch pads, LC-18A, which was originally built by the US Navy for the Vanguard rocket, and LC-18B, which was originally by the US Air Force used for tests of the PGM-17 Thor missile. LC-18B was used for 17 tests of Thor missiles between 4 June 1958 and 29 February 1960. Following this, it was also converted for use by Scout rockets.