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Parachute failure led to the tragic crash of Soyuz 1, resulting in the death of cosmonaut Vladimir Komarov. During the spacecraft's re-entry into Earth's atmosphere, the main parachute failed to deploy properly, causing the capsule to spin uncontrollably. The reserve parachute also failed, leading to a hard landing that proved fatal for Komarov. This incident highlighted the critical importance of reliable parachute systems in space missions.