Astronaut Virgil I. Grissom climbs into "Liberty Bell 7" spacecraft the morning of July 21, 1961. Backup Astronaut John Glenn assists in the operation. The Mercury-Redstone 4 (MR-4) successfully launched the Liberty Bell 7 at 7:20 am EST on July 21, 1961. MR-4 was the second in a series of successful U.S. manned suborbital flights.
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Kennedy Space Center
ម្ចាស់រូបថត
NASA
ពិពណ៌នា
Astronaut Virgil I. Grissom climbs into "Liberty Bell 7" spacecraft the morning of July 21, 1961. Backup Astronaut John Glenn assists in the operation. The Mercury-Redstone 4 (MR-4) successfully launched the Liberty Bell 7 at 7:20 am EST on July 21, 1961. MR-4 was the second in a series of successful U.S. manned suborbital flights.