2016 Rio Olympics - Athletics - Preliminary - Men's 4 x 400m Relay Round 1 - Olympic Stadium - Rio de Janeiro, Brazil - 19/08/2016. David Verburg (USA) of USA (R), Javon Francis (JAM) of Jamaica (C) and Machel Cedenio (TTO) of Trinidad and Tobago run the final leg of the race. REUTERS/Lucy Nicholson