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IN SPACE - MARCH 18: The astonaut Alexei LEONOV floating in space for ten minutes, linked with Vostok 2 spaceship only by an umbilical cord. (Photo by Keystone-France/Gamma-Keystone via Getty Images)

IN SPACE - MARCH 18:  The astonaut Alexei LEONOV floating in space for ten minutes, linked with Vostok 2 spaceship only by an umbilical cord.  (Photo by Keystone-France/Gamma-Keystone via Getty Images)