Cosmonaut candidate Anatoly Kartashov was badly injured during a centrifuge test in July 1960 and was subsequently suspended from the program without appeal.
Notes on verification
Confirmed by Smithsonian, NASA history site, Wikipedia (Vostok programme, Kartashov biography, list of training accidents), and Astronautix. Core facts—July 1960 centrifuge injury, hemorrhaging, permanent removal—are well corroborated; 'without appeal' is a characterization consistent with Gagarin's overridden advocacy for him. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=0.917 clusters=3 claim_tier=notable | framework convergence=partial (upstreams: Doran & Bizony 'Starman: The Truth Behind the Legend of Yuri Gagarin', NASA official history office, Astronautix database) — publishers independent, evidence may not be | kind=empirical eligibility=high]
Sources
- How Yuri Gagarin Was Picked to Be First in Space (seed:firsts_and_inventions)
- https://www.nasa.gov/history/60-years-ago-soviets-select-their-first-cosmonauts/ (corroboration)
- http://www.astronautix.com/k/kartashov.html (corroboration)
- https://www.todayifoundout.com/index.php/2024/09/the-mysterious-death-of-yuri-gagarin/ (corroboration)