Apollo astronauts tour the astronaut crew quarters in the Operations and Checkout Building at NASA's Kennedy Space Center.

Apollo astronauts and their families tour the astronaut crew quarters in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida. Here, from left, Apollo 11 command module pilot Michael Collins, Apollo 8 and Apollo 13 crew member Jim Lovell, and Apollo 11 moonwalker Buzz Aldrin share a light moment. The tour followed a ceremony renaming the refurbished Operations and Checkout Building for Apollo 11 astronaut Neil Armstrong, the first person to set foot on the moon. Besides housing the crew quarters, the building's high bay is being used to support the agency's new Orion spacecraft and is the same spaceport facility where the Apollo 11 command/service module and lunar module were prepped for the first lunar landing mission in 1969. Orion is designed to take humans farther than they’ve ever gone before, serving as the exploration vehicle that will carry astronauts to deep space and sustain the crew during travel to destinations such as an asteroid or Mars.

The visit of the former astronauts was part of NASA's 45th anniversary celebration of the moon landing. As the world watched, Neil Armstrong and Aldrin landed in the moon's Sea of Tranquility aboard the lunar module Eagle on July 20, 1969. Meanwhile, crewmate Collins orbited above in the command module Columbia. For more, visit http://www.nasa.gov/press/2014/july/nasa-honors-historic-first-moon-landing-eyes-first-mars-mission. Photo credit: NASA/Kim Shiflett