Yuri Ivanovich Vorishilov was a cosmonaut, botanist, and KGB agent who travelled to Minerva aboard the space shuttle Tsiolkovsky. While Oleg Lopatin was known to be a chekist to all the crew, Voroshilov was planted secretly. Not even Lopatin knew of his identity. Everyone did know, however, that their crew contained a second Chekist.
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