was a basic one, would john glenn s body survive the flight. could we do this or not. would your are eye balls change shape. that was the concerns and the little miniature eye chart is still on friendship 7 in the smithsonian in washington. would the fluid in the inner ears move randomly and give you vertigo. things that we didn t know the answer to then. the basic questions of survival in space were answered by john glenn s flight so later flights were still able to ex-focus on other ex-pair isn ts. and why he took the risks. he was asked and here is how he and the question. it was important for our country. it was important because of the cold war. it was a new step forward and we were proud to be representing our country there. you made it as safe as you possibly could and what little bit of risk was left was we accepted that. these two surviving mercury