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Molly Huddle

Athletes using power of the selfie to clean sports of doping

It resembles the symbol for infinity: a sideways "S'' that Kara Goucher, Molly Huddle and other elite U.S. athletes suddenly are sporting on biceps, wrists and shins.

The tattoos are temporary. But the campaign they represent is an all-out attempt to permanently purge competitive athletics of doping.

"People are getting the impression that everyone's dirty," Goucher, a top-ranked marathoner based in Boulder, Colorado, told The Associated Press. "We need to build the sport back up in a positive light."

That's the goal of the Clean Sport Collective , a new anti-doping initiative making a splash on social media.

It launched this month with...