2016 Rio Olympics - Swimming - Men's 4 x 200m Freestyle Relay - Olympics Aquatics Stadium - Rio de Janeiro, Brazil - 09/08/2016. Michael Phelps (USA) of USA prepares to swim with an inverted Speedo cap borrowed from teammate Conor Dwyer after his own "MP" cap ripped. Picture taken August 9, 2016. REUTERS/Michael Dalder