July 20th is Moon Day, Space Exploration Day and the anniversary of the first Apollo 11 moonwalk. Here’s a look at the Apollo program and the new Artemis program to return to the lunar surface.

Buzz Aldrin pays tribute to the Apollo 11 mission on its anniversary, invoking Kennedy's famous speech and expressing gratitude to all who helped achieve the historic moon landing.

The awkward moment left O'Brien at a loss for words, and the clip has since gone viral, amassing millions of views online.