OPS-9435 (DSCS-2 5), OPS-9436 (DSCS-2 6)
The launch of US Air Force Titan IIIC took place on 20 May 1975, launching the OPS-9435 (DSCS-2 5), OPS-9436 (DSCS-2 6) mission. The launch site was Cape Canaveral, Florida, United States. The payload should have been deployed in a GEO orbit.