Sydney McLaughlin smashes her 400m hurdles world record to win gold

The 22-year-old U.S. hurdler ran a jaw-dropping 50.68 seconds to win her first world championship title

Sydney McLaughlin breaks her own world record at U.S. trials

She was racing against herself and set a new 400m hurdles world record of 51.41 seconds

Canada’s 4x400m team just misses podium in relay final

The U.S. brought star-studded lineups to win double Olympic gold in the 4x400m