Space travel appears safe and routine today. The loss of Gus Grissom, Ed White and Pilot Roger B. Chaffee on January 27, 1967 and later, the loss of the Challenger and Columbia and the losses of Cosmonauts is space served as a reminder of how dangerous space travel really is.
https://en.wikipedia.org/wiki/Gus_Grissom
John Glenn was truly a pioneer having been the first American to orbit the Earth. He was a distinguished fighter pilot,in both World War II and Korea, with five Distinguished Flying Crosses and eighteen clusters.
Rest in Peace John.