Space Launch Complex 20 (SLC-20), previously designated Launch Complex 20 (LC-20), is a launch site at Cape Canaveral Air Force Station, Florida. SLC-20 is located at the northern terminus of ICBM Road, between Space Launch Complex 19 and Space Launch Complex 34.
This facility was constructed in the late 1950s for the Titan I Missile Program, modified in 1964 for the Titan III Program, and further modified in the late 1980s for the Starbird launch vehicles associated with the shuttle Starlab mission. Several Titan I rockets and four or five Titan III rockets were launched from SLC-20. SLC-20 was deactivated in 1996.
In 1999, the site was re-activated to support new launch facilities under the direction of Space Florida for commercial launches. The re-activation included upgrades to Launch Pad A and the construction of a new building along the perimeter road, northeast of the blockhouse.
The site is currently occupied by NASA's Advanced Technology Development Center (ATDC), a research and development project to provide infrastructure to test, demonstrate and qualify new spaceport technologies. The site is shared with the Florida Air National Guard.