Announcement of their intention to launch an earth satellite during the International Geophysical Year by the Soviets at the Legation of the USSR, in Copenhagen, Denmark, on August 1955, shortly after the Americans announced their intentions to launch a satellite. Left to right: Vereschetin, Mr. Sannikov-Soviet State Security; Professor Kyrill F. Ogorodikov, Astronomy, Leningrad University; Leonid Ivanovich Sedov, Specialist in mechanics, USSR Academy of Sciences.

Credits - NASA