Astronaut Grissom talks to backup John Glenn prior to insertion

S61-02882 (1961) --- Astronaut Virgil I. (Gus) Grissom, suited up and ready to climb into Liberty Bell 7 spacecraft, talks with backup pilot John H. Glenn prior to insertion. The Mercury-Redstone 4 (MR-4) mission was scrubbed a few hours later due to unfavorable weather over the launch pad. Photo credit: NASA