The Soviet Union launches Soyuz 16, a six-day manned space mission to test modifications to the Soyuz vehicle design ahead of 1975‘s Apollo-Soyuz Test Project international flight. Cosmonauts Anatoly Filipchenko and Nikolai Rukavishnikov test the new Soyuz docking mechanism and solar panels, and new rendezvous/docking equipment intended to assist with the Apollo-Soyuz flight as well as to prevent “wasted” missions such as Soyuz 15.
