Danny Willett at Augusta National, Dustin Johnson at Oakmont. At the Masters, it was Jordan Spieth hitting two balls in the water on No. 12 and losing a five-shot lead with a 41 on the back nine. At Oakmont, it was the USGA adding new meaning to the ''toughest test in golf.'' Johnson, with a history of failure in the majors, had to play the final seven holes on the hardest course in America without knowing if his score was going to be one shot higher when he finished. More...