The Apollo Soyuz Test Project Saturn 1B launch vehicle thunders away from KSC's Launch Complex 39B at 3:50 p.m. on July 15, 1975. Aboard the Apollo Command Module are ASTP astronauts Thomas Stafford, Vance Brand and Donald Slayton. The astronauts would rendezvous and dock with a Soyuz spacecraft, launched that morning from the Baikonur launch facility in the Soviet Union, carrying Soviet cosmonauts Aleksey Leonov and Valerly Kubasov.

Credits - NASA