Free diver Craig Clasen fights with a 12-foot tiger shark to free his filmmaker friend Ryan McInnis of the danger in deep waters south of the Mississippi River's mouth in the Gulf of Mexico in this photo released on March 11, 2009. His wrestling with the giant lasted for two hours. The two, together with other friends, fellow fisherman Cameron Kirkconnell and photographer D.J Struntz had been hunting with spear guns for yellow fin tuna when the tiger shark attacked. [sina.com.cn]