Open Extended ReactionsThe United States, which had a frustrating swimming world championships, ended on a high note Sunday with a world record in the women's 4x100 medley in the last event of the eight-day championships. The United States finished with nine gold medals and 29 overall, ahead of Australia with eight gold and 20 overall. Regan Smith, Kate Douglass, Gretchen Walsh and Torri Huske of the United States set a world record in the women's 4x100 medley with a time of 3 minutes, 49.34 seconds. Kolesnikov holds the world record (23.55). The Neutral Athletes won the men's 4x100 medley relay (3:26.93), followed by France (3:27.96) and the United States (3:28.62).