Abstract For the staff at the Soviet Union’s Institute of Aviation and Space Medicine, the second orbital biological flight, coming nearly 3 years after Sputnik 2, began very much like the first. A telegram arrived at the office of the director alerting him to the imminent launch of the satellite. Scheduled for 15 August, this flight would be the first since Sputnik 2 to take dogs back to space. With one major difference — this time they would return. The successful recovery of a satellite from orbit would mark a major milestone in the quest towards a manned orbital flight.


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