TOKYO — Armand "Mondo" Duplantis traded handshakes and hugs with the pole vaulters he'd just beaten to capture his third world championship. He took a leisurely walk toward the stands to talk to his parents, his brother, his fiancee. Then, like any great performer in a jam-packed stadium, he turned around, walked back onstage and delivered the encore the people had been waiting for. It was another wo

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