NASA officials and Apollo astronauts tour the Operations and Checkout Building named for Apollo 11 astronaut Neil Armstrong the person to set foot on the moon.

At the Kennedy Space Center in Florida, NASA officials and Apollo astronauts tour the refurbished Operations and Checkout Building, newly named for Apollo 11 astronaut Neil Armstrong, the first person to set foot on the moon. From left, are Apollo 11 astronaut Buzz Aldrin, Mark Geyer, Orion Program manager, and Scott Wilson, manager, production operations for the Orion Program. Also at the renaming ceremony were Apollo astronauts Michael Collins and Jim Lovell. The building's high bay is being used to support the agency's new Orion spacecraft, which will lift off atop the Space Launch System. 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