Shooting competitor Kim Rhode looks down the barrel of her shotgun as she poses for a portrait at the U.S. Olympic Committee Media Summit in Beverly Hills, Los Angeles, California March 8, 2016. REUTERS/Lucy Nicholson

Workers are pictured in the tennis venue at the 2016 Rio Olympics Park in Rio de Janeiro, Brazil, July 11, 2016. REUTERS/Bruno Kelly

A worker looks from a balcony at a building of the Olympic Village in Rio de Janeiro, Brazil June 15, 2016. Picture taken on June 15, 2016. REUTERS/Ricardo Moraes

A construction worker walks by a logo of the Rio 2016 Olympics in Rio de Janeiro, Brazil, July 27, 2016. REUTERS/Kai Pfaffenbach

Russian Olympic Committee (ROC) chief Alexander Zhukov attends a news conference ahead of Russian Olympic team departure to Rio 2016 Olympic Games in Moscow, Russia, July 26, 2016. REUTERS/Maxim Shemetov

Thomas Bach, President of the International Olympic Committee (IOC), greets a member of Swiss team upon his arrival for Rio 2016 Olympic games at Antonio Carlos Jobim (Galeao) International Airport in Rio de Janeiro, Brazil, on July 27, 2016. REUTERS/Yasuyoshi Chiba/Pool

Russian President Vladimir Putin speaks during a personal send-off for members of the Russian Olympic team at the Kremlin in Moscow, Russia, July 27, 2016. REUTERS/Maxim Shemetov

Russian President Vladimir Putin arrives for a personal send-off for members of the Russian Olympic team at the Kremlin in Moscow, Russia, July 27, 2016. REUTERS/Maxim Shemetov