Jamaican Olympic gold medallist Bolt jokes with U.S. sprinter Spearmon as they leave their training session...
Jamaican Olympic gold medallist Usain Bolt (L) jokes with U.S. sprinter Wallace Spearmon as they leave their training session for the "Mano a Mano" challenge on Copacabana beach in Rio de Janeiro August 15, 2014. The "Mano a Mano" challenge will be held on August 17. REUTERS/Sergio Moraes (BRAZIL - Tags: SPORT ATHLETICS)
