In doing so, Alysson Felix, who won her first gold in 2005, overhauled Usain Bolt's record of 11 world titles
Alysson Felix won her 12th world title, and her first since becoming a mother, as the United States claimed the inaugural world championship 4x400m mixed relay Sunday.
In doing so, Felix, who won her first gold in 2005, overhauled Usain Bolt's record of 11 world titles.
Felix ran the second leg as the U.S. team also featuring Wilbert London, Courtney Okolo and Michael Cherry won in three minutes 9.04s - a world record for the new event - to finish ahead of Jamaica and Bahrain.
The team draped themselves in U.S. flags as they celebrated their win but, with barely any spectators in the Khalifa Stadium, went straight down the tunnel instead of completing a lap of honor.
Felix, 33, has also won three world titles in the women's 200m, one in the 400m, three in the women's 4x100m relay and four in the women's 4x400m relay.