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Soyuz 7K-ST No. 16L, intended to launch a crew to the Salyut 7 space station, explodes on the launch pad. The launch escape system is activated before the Soyuz-U rocket explodes, saving the crew.

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Soyuz 7K-ST No.16L
Aborted 1983 Soviet crewed spaceflight
Soyuz 7K-ST No.16L, sometimes known as Soyuz T-10a or Soyuz T-10-1, was an unsuccessful Soyuz mission intended to visit the Salyut 7 space station, which was occupied by the Soyuz T-9 crew. However, it never finished its launch countdown; the launch vehicle was destroyed on the…Source: Wikipedia (CC BY-SA)
Salyut 7
Soviet space station (1982–1991)
Salyut 7, also known as DOS-6 was a space station in low Earth orbit from April 1982 to February 1991. It was first crewed in May 1982 with two crew via Soyuz T-5, and last visited in June 1986, by Soyuz T-15. Various crew and modules were used over its lifetime, including 12…Source: Wikipedia (CC BY-SA)
Launch escape system
System to get the crew to safety if a rocket launch fails
A launch escape system (LES) or launch abort system (LAS) is a crew-safety system connected to a space capsule. It is used in the event of a critical emergency to quickly separate the capsule from its launch vehicle in case of an emergency requiring the abort of the launch, such…Source: Wikipedia (CC BY-SA)
Soyuz-U
Soyuz rocket design variant
Soyuz-U was a Soviet and later Russian expendable medium-lift launch vehicle designed by the TsSKB design bureau and constructed at the Progress factory in Samara, Russia. The U designation stands for unified, as the launch vehicle was the replacement for both the Voskhod rocket…Source: Wikipedia (CC BY-SA)
September 26
Day of the year
September 26 is the 269th day of the year in the Gregorian calendar; 96 days remain until the end of the year.Source: Wikipedia (CC BY-SA)