Image: Orion crew module at the Neil Armstrong Operations and Checkout Building, Kennedy Space Center

NASA's Orion spacecraft crew module has been stacked on the service module inside the Operations and Checkout Building at Kennedy Space Center—renamed on July 21, 2014 as the Neil Armstrong Operations and Checkout Building in honor of the legendary astronaut and first man to set foot on the moon, Neil Armstrong.

The Operations and Checkout Building was built in 1964. The facility has played a vital role in NASA's spaceflight history. The high bay was used during the Apollo program to process and test the command, service and lunar modules.

The facility is being used today to process and assemble NASA's Orion spacecraft as the agency prepares to embark on the next giant leap in space exploration, sending astronauts to an asteroid and Mars.