L-R Seated: Commander Vance B. Brand; Pilot Robert L. Gibson.
L-R Standing: Mission Specialist Robert L. Stewart, Ronald McNair,, Bruce McCandless II.
The tenth Space Shuttle mission, STS-41B, blasted off February 3, 1984 on the Challenger. IIt was the first space flight for Ronald McNair. Both McCandless and Stewart performed the first untethered EVAs on the fourth day. They are pictured above in the Manual Maneuvering Units.
Unfortunately, Challenger and McNair met their end on January 28, 1986