Katie Ledecky swam a sensational anchor leg to claim her third gold medal of the Rio Olympics as the United States won the women's 4x200m freestyle relay on Wednesday. 
Ledecky overhauled Australia's Tamsin Cook to take her team home in 7min 43.03sec, beating the Aussies into second place with Canada third. 
"I was prepared for any circumstance, whether we were ahead or behind," Ledecky said. 
Leah Neale, Emma McKeon, Bronte Barratt and Cook touched in 7:44.87, while Canada's Katerine Savard, Taylor Ruck, Brittany MacLean and Penny Oleksiak clocked 7:45.39. 
Ledecky added the relay gold to her individual triumphs in the 200m and 400m free. She also anchored the US 4x100m free relay team to silver behind Australia.

Source : QNA