Versatile Allyson Felix anchors the USA 4x400 (Photo Kim Spir)

Debbie Dunn opened up a big lead for USA Blue on the first leg, which Lashinda Demus maintained, despite a challenge from Jamaica’s Novlene Williams. Same thing on the third leg: Dee Dee Trotter (USA Blue) held off Kaliese Spencer (Jamaica). USA Blue’s Allyson Felix wrapped things up easily on the anchor 3:26.12.

(Note: Sanya Richards-Ross was scheduled to run for the U.S., but she strained her quadricep while working out yesterday and had to scratch.)

Full results can be found here.