1971 & ndash ; The crew of the Soviet Soyuz 11 spacecraft are killed when their air supply escapes through a faulty valve .
1971 - The crew of Soyuz 11 are suffocated when their air supply escapes through a faulty valve .
1971 - The crew of Soyuz 11 are suffocated when their air supply escapes through a faulty valve .
Cambiar a una redacción más simple: 1971 & ndash ; The crew of the Soviet Soyuz 11 spacecraft are killed when their air supply escapes through a faulty valve . Producción: