Technicians help guide a special crane around space shuttle Atlantis as work begins to remove the spacecraft's reaction control system.

In Orbiter Processing Facility-2 (OPF-2) at NASA’s Kennedy Space Center in Florida, technicians help guide a special crane around space shuttle Atlantis as work begins to remove the spacecraft’s forward reaction control system. The system provided some of the maneuvering capabilities to the spacecraft during its missions. Atlantis glided to a landing, July 21, 2011, at Kennedy Space Center’s Shuttle Landing Facility, completing NASA’s final space shuttle mission, STS-135. The shuttle is in OPF-2 being decommissioned and prepared for eventual display at the Kennedy Space Center Visitor Complex in Florida. Photo credit: Kim Shiflett