Amazing Photos from the Space Shuttle Discovery

Curtain Call for a Hero
Three of the astronauts on the seven-person crew that blasted off aboard Discovery in October 1998 run through a liftoff dress rehearsal on the pad at Cape Canaveral. In the center is then-77 year-old Senator John Glenn, who became the first American to orbit the Earth in February 1962, and then returned to space after a cool 36-year hiatus.

• John Glenn: A Hero's Life in Images
• Eathrise: Iconic Images of Earth from Space