Vostok programme
On 12 April 1961, a Vostok-K rocket was used to launch Vostok 1, the first manned spaceflight, which made Yuri Gagarin the first human to fly in space. All six manned missions of the Vostok programme were launched using Vostok-K rockets. The first two Zenit reconnaissance satellites were also launched with the Vostok-K, but it was soon replaced in that capacity with the uprated 8A92 booster. After the conclusion of the Vostok program, there were two remaining 8K72Ks left; these were used to launch four Elektron scientific satellites on 30 January and 10 July 1964.