Dana Vollmer, Missy Franklin, Allison Schmitt and Rebecca Soni celebrate after winning gold in the 4x100m medley relay.
Granbury's Dana Vollmer has another gold medal and another world record.
Vollmer swam the women's 4x100m medley relay final Saturday with Allison Schmitt, Missy Franklin and Rebecca Soni.
Not only did they win gold, but they set a new world record in the process with a swim of 3:52.05., .14 off the previous best set by China in the 2009 world championships.
Franklin was the first in the water and staked the team to a nice lead early in the race. She was followed by Soni, Vollmer and Schmitt.
The gold is Vollmer's third of the London Games and her fourth overall. Franklin, 17 and who'll start her senior year of high school in the fall, finishes the games with four golds and a bronze, while Schmitt leaves with three golds, a silver and a bronze.
Australia finished the 4x100 with silver while Japan earned the Bronze.
Team USA earned the trip to the finals with swimmers Rachel Bootsma, Breeja Larson, Claire Donahue and Jessica Hardy swimming the qualifier the day before.