John Glenn was an space pilot.
John Herschel Glenn Jr. -LRB- July 18 , 1921 -- December 8 , 2016 -RRB- was a United States Marine Corps aviator , engineer , astronaut , and United States Senator from Ohio.
An astronaut or cosmonaut is a person trained by a human spaceflight program to command , pilot , or serve as a crew member of a spacecraft.
