"WASHINGTON, DC - FEBRUARY 28:  American swimmer and Olympic gold medalist Michael Phelps testifies during a hearing before the Oversight and Investigations Subcommittee of House Energy and Commerce Committee February 28, 2017 on Capitol Hill in Washington, DC. The subcommittee held a hearing on ""Ways to Improve and Strengthen the International Anti-Doping System.""  (Photo by Alex Wong/Getty Images)"