https://www.space.com/cosmonaut-alexei-leonov-first-spacewalker-dies-at-85.html
btw, I highly recommend reading Two Sides of the Moon, co-written by Mr. Leonov and astronaut David Scott (Gemini 8 pilot and Apollo 15 commander), for two different views of the 1960s space race between the US and the Soviet Union, and their work leading up to the 1975 Apollo-Soyuz Test Project.
LINK