CNN correspondent John Zarella left moderates NASA's 40th Anniversary of Apollo Celebration of the launch and landing on the moon.

CNN correspondent John Zarella, left, moderates NASA's 40th Anniversary of Apollo Celebration of the July 1969 launch and landing on the moon. The ceremony, held in the Apollo/Saturn V Center at NASA's Kennedy Space Center in Florida featured Apollo astronauts (at the dais) Buzz Aldrin, Walt Cunningham, Edgar Mitchell, Al Worden, Charlie Duke, Vance Brand, Gerald Carr and Bruce McCandless. Photo credit: NASA/Kim Shiflett