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| Soyuz 1 launch cover with a Kaluga postmark on April 23, 1967. |
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| Photo: This image published by an official Communist news agency, shows veteran cosmonaut Vladimir Komarov undergoing a medical test prior to his space mission on April 22. Komarov, aboard his spacecraft Soyuz 1, is orbiting the Earth at a speed of 18,641 miles per hour. |
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| A launch cover for Soyuz 1, featuring a Liepaja postmark dated April 23, 1967. |
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| Photo: Colonel Vladimir Komarov, who lost his life during the Soyuz 1 mission when his descent module crashed to the ground because of a parachute failure. |
