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In a close finish, Seth Wescott of the United States nabs the gold in the snowboard cross final.
This was one of many photo finishes captured by a 2,000-frame-per-second camera from Omega.
American Apolo Anton Ohno barely edges out Canadian Charles Hamelin in a semifinal heat of the men's 1,000-meter speedskating.
In the finals of the same event, it was two Koreans in a tight finish for the gold, with Jung-Su Lee beating Ho-Suk Lee and Ohno getting the bronze.
In a heat of the men's 1,500 meter speedskating, American Shani Davis reaches the line ahead of Canadian Lucas Makowsky, who finished two seconds back of Davis.
A close finish in the 30KM men's pursuit skiing event. Here, the face on the face of the Swedish skier says everything one needs to know about who won.