OAKMONT, Pennsylvania :Former Oakmont caddie-turned-dentist Matt Vogt, who qualified for the U.S. Open last week, could have used some laughing gas after a rough start to the year's third major on Thursday but still walked away thankful for all he had accomplished. The 34-year-old amateur, who grew up outside Pittsburgh and caddied at Oakmont where he also got to play on Monday nights, had the honour of hitting the first shot of the U.S. Open where he went on to card a 12-over-par 82. "Honestly,