London

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The reigning two-time Olympic champions are still smarting over the excruciating penalty-kick shootout loss to Japan in last year's World Cup final. Veterans of that team—including (clockwise from far left)...

At the 2011 Pan American Games in Guadalajara, the underdog U.S. stunned world No. 1 Argentina to win its first international gold medal. In London, led by captain Lauren Crandall (left, top), 27, and striker Katie...

The U.S. team will send a pair of world champions to the mat. Clarissa Chun (above, left), a 30-year-old native of Hawaii, finished fifth in the 105 ½-pound division in Beijing and won a world title later in 2008....

The U.S. men's Olympic effort will be an intriguing test of young pros—the tournament is for under-23 players, plus up to three per team of any age—to say nothing of a new coach. Caleb Porter took over in October,...