Initially, the selection process for astronauts was very strict, but after the flight of Leonov and Belyaev, the requirements were relaxed.

During their landing, a technical malfunction occurred, forcing Pavel Belyayev to land the spacecraft manually. As a result, they ended up in a snowy taiga and spent more than two days there. The astronauts faced significant challenges in the forest without the necessary equipment.

Everything ended well, but after this incident, the astronaut kit was increased.