Glenn was the oldest human being to be in space

John Glenn completed his most recent mission in 1998, when he was 77 years old. He would spend 9 days in space inside the Discovery orbiter for the space shuttle. Glenn was therefore named the oldest person to travel into space and carry out a mission.

Glenn took part in a number of tests to discover how the aging process will be impacted in space, which was another crucial step for NASA and Glenn. It also forged a unique connection with his own time and experience as a senator, as he consistently focused on Ohio's and his country's aging populations while he was in office.

Glenn was the first American to orbit the Earth, and he did so safely. However, the letter, which was written to Air Force Brig. Gen. Edward G. Lansdale and was in charge of Operation Mongoose—a complex plan to incite revolution in Cuba—was full of additional recommendations, some of which were just absurd.