5 abr 1975 ano - The Soviet manned space mission (Soyuz 18a) ends in failure during its ascent into orbit when a critical malfunction occurs in the second and third stages of the booster rocket during staging at an altitude of 192 km, resulting in the cosmonauts and their Soyuz spacecraft having to be ripped free from the vehicle. Both cosmonauts (Vasily Lazarev and Oleg Makarov) survive (Linha do tempo)