1st man to die in space mission was aware of faulty capsule
Soviet cosmonaut Vladimir Komarov, who died while re-entering Earth on April 24, 1967, was aware of 203 structural problems in Soyuz-1 capsule. Soyuz-1 was inspected by cosmonaut Yuri Gagarin, serving as the mission's backup pilot. When asked why he wasn't refusing the mission, Komarov broke down and said "he'll die instead of me. We've got to take care of him."