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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Gold medalists, left to right, Katie Ledecky, Allison Schmitt, Leah Smith and Maya DiRado of the United States pose on the podium during the medal ceremony for the women's 4 x 200 meter freestyle relay final Wednesday.
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Women's rugby teammates Kelly Griffin (left) and Jillion Potter demonstrate how they would protect Richelle Stephens (bottom) as she attempts to hand off the ball during practice at Olympic Training Center in San Diego. Women's rugby is making its Olympic debut in Rio.
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Russian Olympians, along with coaches and other officials, pose outside the Assumption Cathedral in Moscow on Wednesday before heading to Brazil. Russia had planned to send nearly 400 athletes to the Rio Games, but more than 110 have been banned because of a doping scandal.
Justin Gatlin celebrates victory in the 100 meters at the U.S. Olympic Trials for track and field. Gatlin has been suspended twice for failing doping tests, once in 2001 and again in 2006.
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