Russian Cosmonaut Alexei Leonov was the first human to perform a spacewalk on this day in 1965. Happy Anniversary, Alexei! This rare footage from Roscosmos was broadcast on Russian television. | Star Letters

On March 18, 1965, Soviet cosmonaut Alexei Leonov became the first human to walk in space, spending 12 minutes outside the Voskhod 2 spacecraft. Watch this historic footage of a daring mission that proved the USSR’s dominance in space exploration! | USSR Pictures