Shuttle Discovery on pad for STS 51-D missionShuttle Discovery on the launch pad for the STS 51-D mission.Image Credit: NASA Facebook Pinterest X LinkedIn Email https://www.nasa.gov/image-detail/amf-s85-30176/Copy URL to clipboard> DownloadShareTakenApril 12, 1985ProducerJSCImage CreditNASASize1508x1920pxPIA NumberS85-30176