In Firing Room 4 of the Launch Control Center, employees wave American flags after the successful launch of Space Shuttle Discovery on mission STS-121. Liftoff occurred at 2:38 p.m. EDT. During the 12-day mission, the STS-121 crew will test new equipment and procedures to improve shuttle safety, as well as deliver supplies and make repairs to the International Space Station. Landing is scheduled for July 17 at Kennedy's Shuttle Landing Facility.
Image credit: NASA/Bill Ingalls