Sydney McLaughlin-Levrone breaks 400-meter hurdles world record for fifth time CNNHow to watch Day 10 of U.S. Olympic Track & Field Trials: TV schedule The Register-GuardRewinding Day 10 of U.S. Olympic track and field trials OregonLiveUSA's Sydney McLaughlin-Levrone breaks 400m hurdles world record for fifth time The GuardianSydney McLaughlin-Levrone lowers 400 hurdles world record again for fifth time in three-plus years Yahoo Sports