US boxer Claressa Shields punching toward 2nd Olympic gold (The Associated Press)

Claressa Shields got the Olympic rings tattooed on her powerful right bicep five weeks ago. ”When I win my second Olympic gold medal, I’m going to put ‘Au’ right here,” Shields said, pointing to the special spot. Four years after Shields unexpectedly dominated the first Olympic women’s boxing tournament, she is taking confident steps toward a tantalizing future.