RIO DE JANEIRO, BRAZIL - AUGUST 06: Xuan Vinh Hoang of Vietnam gestures prior to competing in the 10m Air Pistol Men's Finals on Day 1 of the Rio 2016 Olympic Games at the Olympic Shooting Centre on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Sam Greenwood/Getty Images)
Vietnam's Hoang Xuan Vinh competes in the men's 50m pistol final at the London 2012 Olympic Games at the Royal Artillery Barracks in London on August 5, 2012. AFP PHOTO/MARWAN NAAMANI (Photo credit should read MARWAN NAAMANI/AFP/GettyImages)
RIO DE JANEIRO, BRAZIL - AUGUST 06: Vietnam's gold medallist Hoang Xuan Vinh poses on the podium during the medal ceremony for the men's 10m Air Pistol shooting event at the Rio 2016 Olympic Games at the Olympic Shooting Centre on Day 1 in Rio de Janeiro, Brazil. (Photo by Sam Greenwood/Getty Images)
RIO DE JANEIRO, BRAZIL - AUGUST 06: (L-R) Felipe Almeida Wu of Brazil (silver medal), Xuan Vinh Hoang of Vietnam (gold medal), and Wei Pang of China (bronze medal) pose after competing in the 10m Air Pistol Men's Finals on Day 1 of the Rio 2016 Olympic Games at the Olympic Shooting Centre on August 6, 2016 in Rio de Janeiro, Brazil. (Photo by Sam Greenwood/Getty Images)
