Anthony Kim, left, and David Chung joke around as they walk up the 12th fairway during a practice round for the U.S. Open Championship golf tournament in Bethesda, Md., Wednesday, June 15, 2011.

Anthony Kim, left, and David Chung joke around as they walk up the 12th fairway during a practice round for the U.S. Open Championship golf tournament in Bethesda, Md., Wednesday, June 15, 2011.