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Nati Harnik, Associated Press
Matt Grevers reacts after swimming in a men's 100-meter freestyle semifinal at the U.S. Olympic swimming trials, Thursday, June 28, 2012, in Omaha, Neb.

OMAHA, Neb. — Allison Schmitt has added another race to her growing Olympic schedule, winning the 200-meter freestyle at the U.S. swimming trials.

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Schmitt broke her own American record with a time of 1 minute, 54.40 seconds Thursday night, the best in the world this year. Already the 400 free winner in Omaha, she set the previous national record in the 2009 world championships.

Missy Franklin claimed the second 200 spot on the team for London, rallying from fifth place at the first turn to take the runner-up spot in 1:56.79.

Dana Vollmer and Lauren Perdue finished third and fourth, assuring themselves of being in the pool for the 800 free relay. Shannon Vreeland (fifth) and Alyssa Anderson (sixth) also are likely to be taken to London as potential relay swimmers.