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172 runners started an ultra-marathon in China. 21 never came back

By CNN.com - RSS Channel - World May 28, 2021 | 7:29 PM

When Zhang Xiaotao set off last weekend on a 100-kilometer (62-mile) ultra-marathon through the jagged mountains of northwestern China, he didn’t know he was embarking on one of the deadliest journeys in the country’s sporting history.