Space Rocket History #172 – Soyuz 4 & 5 – World’s First Space Station? – Part 1
The objectives of the Soyuz 4 & 5 mission were to dock two manned Soyuz 7K-0Ks, transfer two Cosmonauts from Soyuz 5 to Soyuz 4 by means of a space walk, and then safely return both crews to earth.