Scott Carpenter and John Glenn shake hands with NASA Administrator Charles Bolden right and Bob Cabana presentation for Kennedy employees.

Mercury astronauts Scott Carpenter and John Glenn shake hands with NASA Administrator Charles Bolden right and Bob Cabana, director of NASA's Kennedy Space Center in Florida left at the conclusion of the "50 Years of Americans in Orbit" presentation for Kennedy employees.

This year marks 50 years since Glenn and Carpenter became the first two Americans to orbit Earth. Photo credit: NASA/Kim Shiflett