Yuri Gagarin was the backup pilot for Soyuz 1, and was aware of the design problems and the pressures from the Politburo to proceed with the flight.
Yuri Gagarin was the backup pilot for Soyuz 1. Yuri Gagarin was aware of the design problems from the Politburo. This was to proceed with the flight. Yuri Gagarin was aware of the pressures from the Politburo. This was to proceed with the flight.