— Ch. 1 · Cold War Origins And Détente —
Apollo–Soyuz.
~5 min read · Ch. 1 of 6
On the 19th of April, 1971, the USSR launched its first piloted orbital space station, Salyut 1. Just months prior, the United States had sent Apollo 14 to land on the Moon. Each side gave the other little coverage of their achievements during that tense period. The Vietnam War was still raging when tensions between Washington and Moscow ran high. Soviet press printed scathing headlines over photos of American launches, calling them armed intrusions into Laos. Yet a thaw began after the war ended. President Richard Nixon's Foreign Policy Adviser Henry Kissinger told NASA administrator George Low in January 1971 that he wanted them to commit fully to cooperation with Moscow. He stated, As long as you stick to space, do anything you want to do. You are free to commit. This political shift paved the way for an agreement signed by both nations in May 1972. That pact committed the United States and the Soviet Union to launch the Apollo, Soyuz Test Project in 1975. Soviet leader Leonid Brezhnev later declared that spacemen from both countries would conduct the first major joint scientific experiment in human history. He argued that Earth looked more beautiful from space and was too small to be threatened by nuclear war.
Engineering Challenges And Solutions
American engineers viewed Soyuz spacecraft as extremely complex and dangerous due to its reliance on automation rather than manual controls. Soviet designers criticized Apollo hardware for being overly complicated and risky for human operators. Christopher C. Kraft, director of the Johnson Space Center, noted that each Soyuz component served one specific function. If any part failed, cosmonauts had to land immediately instead of switching to backups like American crews did. The two sides met between June and December 1971 in Houston and Moscow to resolve these technical differences. Bill Creasy designed the Androgynous Peripheral Attach System adapter to allow either ship to dock with the other regardless of which was active or passive. This docking module became essential because surplus Apollo hardware lacked the standard APAS collar. The Saturn IB rocket carried this special module into orbit after launch. It retrieved the docking unit from the S-IVB upper stage before attaching it to the command module. One end used probe-and-drogue mechanisms common to Lunar Module missions while the other held the new APAS collar. Six ASTP-class Soyuz spacecraft were built total including the one used for the actual mission. Two flew uncrewed as Kosmos satellites before crewed flights began testing the system.