In Orbiter Processing Facility-2 at NASA's Kennedy Space Center in Florida, the flight deck of space shuttle Atlantis is illuminated one last time during preparations to power down Atlantis during Space Shuttle Program transition and retirement activities, on December 22, 2011. Atlantis is being prepared for public display in 2013 at the Kennedy Space Center Visitor Complex. #

A large crane dismantles a section of the fixed service structure on Launch Pad 39B at NASA's Kennedy Space Center in Florida, on April 6, 2011. The structure was designed to support the unique needs of the Space Shuttle Program. the pad is now being restructured for future use. Its new design will feature a "clean pad" for rockets to come with their own launcher, making it more versatile for a number of vehicles. #

The space shuttle Atlantis is moved towards the huge Vertical Assembly Building for work in its decommissioning at the Kennedy Space Center in Cape Canaveral, Florida, on January 20, 2012. #

In Orbiter Processing Facility-2 at NASA's Kennedy Space Center in Florida, the exterior of the space shuttle Discovery shows evidence of its 39 successful spaceflights, on July 13, 2011. Discovery flew its final mission, STS-133, in February and March 2011, and currently is being prepared for public display at the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Virginia. #

Workers are disconnecting and dismantling components on shuttle Endeavour in Orbiter Processing Facility-1 at NASA's Kennedy Space Center in Florida, on June 29, 2011. Seen here is the view from inside the spacecraft's airlock looking toward the payload bay. The spacecraft is being prepared for public display at the California Science Center in Los Angeles. Endeavour flew 25 missions, spent 299 days in space, orbited Earth 4,671 times and traveled 122,883,151 miles over the course of its 19-year career. #

NASA's Shuttle Carrier Aircraft 905 (front) and 911 (rear) were captured by photographer Carla Thomas as they flew in formation over the Rio Tinto Borax mine west of Boron, California, on August 2, 2011. #

United Space Alliance technicians secure several of space shuttle Endeavour's main propulsion system tanks after they were removed from the orbiter's mid-body, at NASA's Kennedy Space Center in Florida, on March 21, 2012. The tanks will be retained for possible future use on the agency's Space Launch System Program. #

At NASA's Kennedy Space Center, technicians monitor the progress as a large crane lifts and moves the forward reaction control system closer for installation on space shuttle Endeavour, on February 8, 2012. The FRCS helped maneuver a shuttle while it was in orbit. The FRCS was removed from Endeavour and sent to White Sands Test Facility in New Mexico to be cleaned of its toxic propellants. #

Inside NASA's Orbiter Processing Facility-1 in Florida, among hundreds of signatures, technicians transfer seats to the middeck of space shuttle Discovery for installation, on February 14, 2012. #

A crane lifts the airlock from the cargo bay of space shuttle Atlantis in Orbiter Processing Facility-2 in Florida, on December 21, 2011. The airlock was the connecting point between the shuttle and International Space Station. It was removed as part of the ongoing work to prepare the shuttles for public display. #

Inside the Pratt & Whitney Rocketdyne engine shop at NASA's Kennedy Space Center in Florida, a view of the interior of the engine bell of one of the replica shuttle main engines, on December 2, 2011. #

An employee guides a replica shuttle main engine toward installation on space shuttle Discovery, on December 5, 2011. This is the first of three replica engines to be installed. Discovery is being prepared for display at the Smithsonian's National Air and Space Museum, Steven F. Udvar-Hazy Center in Chantilly, Virginia. #

Lined up in a row, six Pratt & Whitney Rocketdyne space shuttle main engines sit on stands inside the Engine Shop at NASA's Kennedy Space Center on October 14, 2011. For the first time, all 15 main engines were in the Engine Shop at the same time. They were being prepared for shipment to NASA's Stennis Space Center in Mississippi for storage following the completion of the Space Shuttle Program. The engines are being repurposed for use on NASA's Space Launch System heavy lift rocket. #

In the Space Shuttle Main Engine Processing Facility, technicians guide a transportation canister as it encloses a Pratt & Whitney Rocketdyne space shuttle main engine, on January 12, 2012. This was the second of the 15 engines used during the Space Shuttle Program to be prepared for transfer to NASA's Stennis Space Center in Mississippi. #

In Orbiter Processing Facility-1, a technician wearing safety equipment inspects shuttle Endeavour's left-hand orbital maneuvering system pod, while the component is removed using a large overhead crane, on July 28, 2011. The spacecraft is being prepared for public display at the California Science Center in Los Angeles. #

At NASA's Kennedy Space Center, space shuttles Discovery (right) and Endeavour go their separate ways outside Orbiter Processing Facility-3 where they paused for a unique "nose-to-nose" photo opportunity, on August 11, 2011. Discovery, which temporarily was being stored in the Vehicle Assembly Building, was switching places with Endeavour, which has been undergoing decommissioning in OPF-1. #

Space Shuttle technicians prepare to re-install three fuel cells in space shuttle Discovery's mid-body, on December 9, 2011. The fuel cells were removed and drained of all fluids in preparation for public display. The hydrogen and oxygen dewars which feed reactants to the fuel cells remain in Discovery's mid-body and have been purged with inert gases and vented down. #

At the Merritt Island Launch Annex Spaceflight Tracking and Data Network Station in Florida, one of two signature 30-foot steerable S-band antennas is slewed from the horizontal to the vertical position for the last time during a closing ceremony recognizing the station's 45 years of service, on June 28, 2011. The antenna was pointed at Kennedy's Shuttle Landing Facility as it was for its last assignment, support of the landing of space shuttle Atlantis, concluding the STS-135 mission. The station was originally established as one of 17 Space Flight Tracking and Data Network stations around the world. In recent history, the station has been used almost exclusively for space shuttle launch and landing support. Following the final launch and landing of the Space Shuttle Program, the MILA station was officially decommissioned. #

The deconstruction of Launch Pad 39B at NASA's Kennedy Space Center in Florida is complete, on September 15, 2011. With a view from the two-track crawlerway, the three 600-foot-tall lightning protection towers and the water tower used for sound suppression stand over the remnants of the fixed service structure. #

The flame trench at Launch Pad 39A at NASA's Kennedy Space Center endured significant flames, vibrations and other stresses during the space shuttle era. Heading into the future, designers are looking for new, flame and vibration-resistant materials to line the trench. To help in the search, a team of mechanical engineering students at Louisiana State University are to build a scaled-down version of the flame trench that Kennedy's scientists can use to try out sample materials for the trench. If the samples work in the lab, they can be tried out in the real flame trenches at Launch Pad 39A and 39B. Photo taken on October 14, 2011. #

At Launch Pad 39A at Kennedy Space Center in Florida, the seven slidewire baskets have traveled down the wires to the ground after technicians released them from the 195-foot level for the final time, on March 16, 2012. The baskets will be removed and put in storage. The system of seven slidewire baskets at launch pads A and B provided an escape route for personnel inside the orbiter or on the orbiter access arm. The baskets are suspended from slidewires that extend from the pad's Fixed Service Structure to a landing zone 1,200 feet to the west. Each basket could hold up to three people. #

The high-fidelity space shuttle model which was on display at the NASA Kennedy Space Center Visitor Complex in Florida turns into the parking lot leading to Kennedy's Launch Complex 39 turn basin, on December 11, 2011. The shuttle was part of a display at the visitor complex that also included an external tank and two solid rocket boosters that were used to show visitors the size of actual space shuttle components. The full-scale shuttle model is being transferred from Kennedy to NASA Johnson Space Center's visitor center in Houston. The model will stay at the turn basin for a few months until it is ready to be transported to Texas via barge. #

A truck hauls a full-size display of a space shuttle external fuel tank from the Kennedy Space Center Visitor Complex as the space-themed attraction makes way for a new exhibit featuring space shuttle Atlantis, on December 2, 2011. #

In Orbiter Processing Facility-2, Lord Stanley's Cup sits in the flight deck of space shuttle Atlantis, on January 18, 2012. The Stanley Cup was awarded to the Boston Bruins after winning the 2011 National Hockey League Championship. Jeremy Jacobs, chairman and chief executive officer of Delaware North Companies and owner of the Boston Bruins, had brought the cup to Florida for Kennedy and Delaware North employees to view and take photographs. #

Space shuttle Atlantis arrives in the transfer aisle of the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida on its move from Orbiter Processing Facility-2, on January 20, 2012. #

At NASA's Kennedy Space Center a crane carries an orbital maneuvering system pod closer to space shuttle Discovery, on October 13, 2011. The OMS pod was returned from White Sands Space Harbor in New Mexico where it underwent a complete deservicing and cleaning. #

In Orbiter Processing Facility-1, a rare underside view of shuttle Endeavour's left-hand orbital maneuvering system pod can be seen as an overhead crane lowers the component onto a transporter, on July 28, 2011. #

A technician monitors the progress as the tail cone is installed around space shuttle Discovery's three replica shuttle main engines for protection during its upcoming flight, on January 12, 2012. #

At NASA's Kennedy Space Center in Florida, space shuttle Atlantis is towed toward Orbiter Processing Facility-1, on March 9, 2012. At left, space shuttle Discovery is being towed to the VAB. Discovery will soon be transported to the Smithsonian's National Air and Space Museum in Virginia, and Atlantis is being prepared for display at the Kennedy Space Center Visitor Complex. #