American stars Melissa Jefferson-Wooden, Noah Lyles and Sydney McLaughlin-Levrone battled through the rain to add another gold to their tally and bring the curtain down on the world championships in Tokyo.
For Jefferson-Wooden it was her third of the week, for Lyles and McLauglin Levrone their second.
Their compatriot Cole Hocker had hoped for two but made up for his disqualification in the 1,500 metres to win the 5,000m.
Jefferson-Wooden swept the women's sprint titles at these championships as the United States won the 4x100m relay, to become only the second woman to achieve that feat.
Shelly-Ann Fraser-Pryce, the first woman to have done that, in 2013, will stand a step lower on the podium than Jefferson-Wooden, as the 38-year-old legend departed from the world stage with a silver m