The U.S. has now won six straight gold medals in the women's 4x400-meter relay dating back to 1996 and has medaled in the event in all but one Olympics since it was introduced in 1972.
Jamaica nabbed..."
http://m.bleacherreport.com/articles/2658954-olympic-track-and-field-2016-womens-4x400m-relay-winners-times-and-results
-vk-
