(21 Feb. 1997) --- This scene of the sun setting on the Space Shuttle Discovery's almost empty cargo bay symbolizes the successful conclusion of the mission, as the seven astronauts inside the crew cabin approach one of the final mission chores -- that of closing the cargo bay doors. The astronauts earlier completed five days of Extravehicular Activities (EVA) designed to service the giant Hubble Space Telescope (HST), now noticeably missing in the bay. At bottom center is part of the top of the exit airlock, making its first flight..