Cyclist Kristin Armstrong of the U.S. holds up her gold medal as she celebrates with her son. Armstrong made history with a third-straight gold in time trials. Armstrong, who turns 43 Thursday, previously retired twice from the sport
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Kerri Walsh Jennings, left, and April Ross of the U.S. dig against Switzerland during a women's beach volleyball match on Aug. 10. Jennings and Ross beat Switzerland's Isabelle Forrer and Anouk Verge-Depre 21-13, 22-24, 15-12 to win their pool and advance to the Round of 16.
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Drops of sweat fly into as Ecuador's Carlos Andres Mina fights Ireland's Joseph Ward, unseen, during the men's light heavy (81kg) match.
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Katie Ledecky of the U.S., right, swims the last leg in the final of the women's 4x200 meter freestyle relay.
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From left, Allison Schmitt, Madeline "Maya" Dirado, Katie Ledecky and Leah Smith celebrate after the U.S. won the women's 4x200m freestyle relay final.
Tina Charles of the U.S. shoots a basket during a women's round Group B basketball match.
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A diver practices ahead of the men's synchronized 3-meter springboard diving final.
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Fencer Liu Yongshi of China peers through her protective mask during her women's foil individual round of 32 bout against Edina Knapek of Hungary.
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Michael Phelps, left, and Ryan Lochte of the U.S. dive into the pool at the start of the men's 200m individual medley semifinal.
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Yolande Bukasa, of the Refugee Olympic Team, competes against Israel's Linda Bolder during the women's 70-kg judo competition.
Australia's center David Andersen, left, vies with Carmelo Anthony of the U.S. during a Group A basketball match.
The United States pulled out a 98-88 victory but it was far from easy. It took a heroic fourth-quarter effort from Carmelo Anthony and Kyrie Irving to put the U.S. over the top.
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Sweden's Linnea Torstensson takes a free throw during the women's preliminary handball match against Russia.
Hannes Aigner of Germany fights with white waters during the men's Kayak (K1) semi-final race.
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Goalkeeper Geronimo Rulli of Argentina is consoled as he cries after losing a match as Argentina is eliminated from the - men's soccer first round Group D tournament.
UESLEI MARCELINO / Reuters
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Italy's goalkeeper Stefano Tempesti stops a shot during the men's water polo preliminary round match against Montenegro.
Eraldo Peres / AP
Argentina's Jonathan Calleri and Honduras' Jhonatan Paz go for a header during a Group D match of the men's Olympic football.
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Russia's center back Ekaterina Ilina vies with Sweden's center and right wing players during the women's preliminaries Group B handball match.
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Sally Conway of Great Britain reacts after defeating Gevrise Emane of France during a women's -70kg bout.
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Ines Boubakri of Tunisia and Eleanor Harvey of Canada compete during the women's individual foil quarterfinal.
United States' Briana Provancha and Annie Haeger compete during the 470 women's sailing race.
Bernat Armangue / AP
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Rebekah Tiler, of Great Britain, competes in the women's 69kg weightlifting competition.
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Ning Ding of China keeps her eye on the ball during her women's table tennis singles semi final match against I Song Kim of Democratic People's Republic of Korea.