Communications lost 3 March 1966

Soyuz 7K-L1/L1S test missions

* Kosmos 146
** Launched 10 March 1967
** Prototype Soyuz 7K-L1P launched by Proton into planned highly elliptical Earth orbit.
* Kosmos 154
** Launched 8 April 1967
** Prototype Soyuz 7K-L1P launched by Proton and failed to go into a planned translunar trajectory.
* Zond 1967A
** Launched 28 September 1967
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