Defective satellites now 25% off! #OTD in 1984, STS-51A launched on a mission to show that the Shuttle orbiters could be used to retrieve malfunctioning satellites in orbit and return them to Earth. 2 satellites were brought back and refurbished. More: go.nasa.gov/3heifTx #NASAhistory nitter.net/NASAhistory/status/…