Launch Complex 39A Launch Complex 39A (LC-39A) was originally built for the Apollo/Saturn V rockets that launched American astronauts on their historic journeys to the Moon and back. Since the late 1960s, Pads A and B at Kennedy Space Center's Launch Complex 39 have served as backdrops for America's most significant human spaceflight endeavors—Apollo, Skylab, Apollo-Soyuz and space shuttle. In 2014, Space Exploration Services, or SpaceX, signed a property agreement with NASA for use and operation of LC-39A for 20 years, part of Kennedy Space Center’s transition to a multi- user spaceport. SpaceX modified LC-39A to adapt it to the needs of the company's Falcon 9 and Falcon Heavy rockets. SpaceX constructed a Horizontal Integration Facility near the perimeter of the pad where rockets are processed for launch prior to rollout to the pad for liftoff. The Transporter Erector (TE) is used to move the Crew Dragon spacecraft to the top of the Falcon 9 rocket on the launch pad.