 Launch Complex 39 (LC-39) was originally built for the Saturn V, the largest and most powerful operational launch vehicle in history, for the Apollo crewed Moon landing program.Since the end of the Apollo program in 1972, LC-39 has been used to launch every NASA human space flight, including Skylab (1973), the Apollo-Soyuz Test Project (1975), and the Space Shuttle program (1981–2011).Since December 1968, all launch operations have been conducted from launch pads A and B at LC-39.