These Olympics, which officially begin Friday U.S. time, are sorely lacking in the usual camaraderie and brotherhood. Fans are absent. COVID protocols already aren't working as planned. Athletes are nervous about being put into quarantine and missing training or events. And what if the star of stars, Simone Biles, is compromised? Ann Killion reports from a nervous, unhappy Tokyo. | Unlimited Chronicle access: sfchronicle.com/pod

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