Mercury-Redstone 4 was the second United States human spaceflight, on July 21, 1961. The suborbital Project Mercury flight was launched with a Mercury-Redstone Launch Vehicle, MRLV-8. The spacecraft, Mercury capsule #11, was nicknamed the Liberty Bell 7, and it was piloted by the astronaut Virgil "Gus" Grissom. July 21, 1961 at 12:20 UTC · Launch Successful Redstone MRLV — National Aeronautics and Space Administration, to Suborbital Launch Complex 5, Cape Canaveral SFS, FL, USA Crew: Gus Grissom Program: Mercury https://www.youtube.com/watch?v=zybhDAkAzls https://www.youtube.com/watch?v=FvZD_ujqLJI Data: Launch Library 2, The Space Devs. Mission patch: via The Space Devs.