Who is the only one of the following astronauts to have served as an aviator in the U.S. Marine Corps?
Alan Shepard
Neil Armstrong
John Glenn
Guion Bluford
Gus Grissom
The correct answer is John Glenn
Who is the only one of the following astronauts to have served as an aviator in the U.S. Marine Corps?
Alan Shepard
Neil Armstrong
John Glenn
Guion Bluford
Gus Grissom
The correct answer is John Glenn