United States' Matthew Grevers competes in a men's 100-meter backstroke swimming semifinal at the Aquatics Centre in the Olympic Park.
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From left, Australia's Christian Sprenger, South Africa's Cameron van der Burgh, and United States' Brendan Hansen pose with their medals for the men's 100-meter breaststroke swimming final.
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United States' Michael Phelps competes in the men's 4x100-meter freestyle relay final.
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United States' Michael Phelps, right, watches after completing his leg of the men's 4x100-meter freestyle relay.
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United States' Ryan Lochte dives into the pool for the final leg of the men's 4X100 meter freestyle relay as teammate Michael Phelps, right, looks on.
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United States' Ryan Lochte, left, competes in the men's 4x100-meter freestyle relay final.
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United States' Michael Phelps reacts after his team won silver in the men's 4x100-meter freestyle relay final.
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From left, United States' Cullen Jones, United States' Ryan Lochte, United States' Nathan Adrian and United States' Michael Phelps pose with their silver medals for the men's 4x100-meter freestyle relay final.
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