The Russian Soyuz 5 mission ( while docked with Soyuz 4) featured the first two-man spacewalk when Yevgeny Khrunov and Alekser Yeliseyev exited their vehicle on January 16th 1969.
The pair were the center of festivities where they were to have met the Russian leader, Brezhnev, but he was the subject of an assassination attempt during the motorcade.