Apart from being an astronaut, Gus Grissom trained as a..?
USAF test pilot
Military strategist
Air Traffic Controller
Commercial Airline Pilot
Answer
Gus Grissom trained as a USAF test pilot before becoming an astronaut. He was a member of the Mercury Seven, the first group of American astronauts selected by NASA. He was the second American to go into space, and the first American to make a spacewalk. He died in the Apollo 1 fire in 1967.
Blast off with Gus Grissom: Journey through the Life of an American Astronaut