Winners and losers from U.S. track and field championships

Noah Lyles taunted Kenny Bednarek as he won 200

Sha'Carri Richardson fails to advance to final round of 200

Sydney McLaughlin-Levrone nearly breaks American record in 400

Katie Ledecky wins gold in epic freestyle showdown

Katie Ledecky 800m highlights: Watch American icon's thrilling win at worlds

Vashti Cunningham leaps for gold, Melissa Jefferson-Wooden makes statement in 100

Police say Sha'Carri Richardson arrested in domestic violence incident

Noah Lyles, Sha'Carri Richardson among stars to watch at U.S. track and field championships

Olympic gold medalist dies after climbing accident

Female athletes to have genetic testing to determine biological sex