Technicians help guide one of space shuttle Discovery's replica shuttle main engines were installed.

Inside Orbiter Processing Facility-1 at NASA’s Kennedy Space Center in Florida, technicians help guide one of space shuttle Discovery’s replica shuttle main engines (RSME) into place after the eyelid and heat shield were installed.

The heat shields are composed of two, semi-circle-shaped sections of thermal protection system tiles that surround the engines. The work is part of the Space Shuttle Program’s transition and retirement processing of shuttle Discovery. Discovery is being prepared for display at the Smithsonian’s National Air and Space Museum, Steven F. Udvar-Hazy Center in Chantilly, Va. For more information, visit http://www.nasa.gov/shuttle. Photo credit: NASA/Dimitri Gerondidakis