Keldysh was convinced that the US planned to use the shuttle for a pre-emptive nuclear strike on Russia. Therefore the USSR needed an analogous capability to maintain the strategic balance. While this discussion was going on, the energies of TsKBEM were completely absorbed in the Apollo-Soyuz program, on which the prestige of the Soviet Union depended. Additional Details: New heavy-lift vehicle. References: 367.

As Chelomei had complained, Soyuz had no reserves or backup systems for repeated manual docking attempts and had to be recovered after a two-day flight. The state commission found that the Igla docking system of the Soyuz needed serious modification. This could not be completed before Salyut 3 decayed. Therefore the planned Soyuz 16 spacecraft became excess to the program (it was later flown as Soyuz 20 to a civilian Salyut station, even though over its two year rated storage life).

Officially: Conduct of joint experiments with the Salyut-3 orbital scientific station. References: 2, 6, 32, 33,60.