Former astronaut John Glenn shows the interior of his “Friendship 7” Mercury spacecraft to wife Annie at the Smithsonian Air and Space Museum in Washington, DC, U.S. on February 20, 2002. Exactly 40 years ago, Glenn became the first American to orbit the Earth in this spacecraft. Glenn is one of America's seven original astronauts. Located in the “Milestones of Flight” gallery, the capsule is one of the museum's most popular attractions. (Photo by Gregg Newton/Reuters)
