1967-04-23 USSR Soyuz 1

Soyuz 1 launch cover with a Kaluga postmark on April 23, 1967.
Photo: "This updated photo, released by an official Communist news source, shows veteran cosmonaut Vladimir Komarov undergoing a medical test some time prior to his 4/22 trip into space. Komarov, riding in his spacecraft, the Soyuz 1, is circling the earth at a speed of 18,641 miles an hour. UPI CABLEPHOTO FROM TASS PHOTO AND BASIC CAPTION MATERIAL FROM AN OFFICIAL COMMUNIST SOURCE. April 23, 1967."
Soyuz 1 launch cover with a Liepaja postmark on April 23, 1967.
Photo: Colonel Vladimir Komarov, who was killed in the Soyuz 1 mission when his descent module crashed into the ground due to a parachute failure.