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ROME, ITALY - JUNE 04: Justin Gatlin of USA reacts after winning the men's 100m during the IAAF Golden Gala at Stadio Olimpico on June 4, 2015 in Rome, Italy. (Photo by Paolo Bruno/Getty Images)

ROME, ITALY - JUNE 04:  Justin Gatlin of USA reacts after winning the men's 100m  during the IAAF Golden Gala at Stadio Olimpico on June 4, 2015 in Rome, Italy.  (Photo by Paolo Bruno/Getty Images)