Tiger Woods of the U.S. celebrates sinking a birdie putt on the 18th green during second round play in 2011 Masters golf tournament at the Augusta National Golf Club in Augusta, Georgia, April 8, 2011. Tiger Woods roared back by playing his final 11 in 7-under. He's tied for third, just three shots back, after a nine-birdie round of 66.[Xinhua/Reuters Photo]