Jul 27, 2014; Eugene, OR, USA; Members of the United States mens and womens 4 x 400m relays pose with United States flags after winning gold medals in the 2014 IAAF World Junior Championships at Hayward Field. Front row: Shakima Wimbley and Olivia Baker and Shamier Little and Kendall Baisden. Back row: Tyler Brown and Michel Cherry and Josephus Lyles and Ricky Morgan. Mandatory Credit: Kirby Lee-USA TODAY Sports