Virginia Thrasher won women's 10-metre air rifle for United States to secure the first gold medal of the 2016 Olympic Games.
The 19-year-old had flown under the radar ahead of the Games but showed impressive accuracy to claim the title by one point with an Olympic record.
Thrasher - who became the American champion in June - amassed 208 points across the nine rounds at the Olympic Shooting Centre, beating Chinese duo Du Li and Yi Siling to gold.
"It was nerve-wracking. My heart was pounding but I would not have changed it," said Thrasher.
"I just had a plan today to do the best I could and I'm happy with my result."
Li had to battle for her place during the finals but she surged back into contention late on, however beating Thrasher proved too much, the Chinese shooter finishing on 207 points.
For defending champion Yi the final looked to be going well in the early rounds, but she slipped down the rankings and had to settle for bronze - 22.6 points adrift of top spot.
Thrasher's team-mate Sarah Scherer was first eliminated in the final, with Snjezana Pejcic, Elaheh Ahmadi, Daria Vdovina and Barbara Engleder also finishing outside of the medals.