Team USA back on top with 4x400m win

Men's 4x400m Full Results POS BIB ATHLETE COUNTRY MARK 1 USA United States USA 2:58.71 WL 2 JAM Jamaica JAM 2:59.88 SB 3 RUS Russia RUS 2:59.90 SB 4 GBR Great Britain GBR 3:00.88 5 BEL Belgium BEL 3:01.02 6 TRI Trinidad and Tobago TRI 3:01.74 7 BRA Brazil BRA 3:02.19 8 AUS Australia AUS 3:02.26 SB