China's Fu Yuanhui (left) celebrates her bronze medal win in the women's 100-meter backstroke with Canada's Kylie Masse, Hungary's Katinka Hosszu and the U.S.'s Kathleen Baker.
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Anita Alvarez and Mariya Koroleva compete in the women's duets synchronized swimming technical routine preliminary on Monday in Rio de Janeiro. Koroleva has suffered several concussions over the years.
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U.S. swimmer Katie Ledecky holds up her gold medal after winning the women's 800-meter freestyle swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Games in London.
Yusra Mardini visits the Olympiapark Berlin on March 9. The 18-year-old Syrian refugee hopes to qualify for the Rio Olympics as a swimmer on the refugee team.
Alexander Hassenstein/Getty Images for IOC
French marathon swimmer Benoit Lecomte (left) prepares to jump into the Potomac River in Washington, D.C., in 2002. In 1998, Lecomte swam across the Atlantic Ocean.
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Daina Bouquin competes in the first U.S. Winter Swimming Championships on Saturday in Lake Memphremagog near Newport, Vt. The event drew swimmers from around the world to race in icy water that was below 32 degrees F.
Herb Swanson for NPR
Attorney Robert Allard, seen here with former swimmer Jancy Thompson in 2010, says USA Swimming still needs to improve its handling of sexual abuse claims. The organization is also facing congressional scrutiny.
Lance Armstrong warms up for the swimming leg of the 2011 Xterra World Championship triathlon in Kapalua, Hawaii (before he was banned from most competitions). This weekend, he'll swim in a Texas meet for masters swimmers.
Hugh Gentry /Reuters /Landov