"Palmer, 78, said they have added sand traps on holes 1 through 3 and have changed, or will change, traps on holes 4 and 6. He said the third hole is a perfect example of what he's hoping to achieve. With added bunkers on the hillside that faces the tee box, players have to decide whether to take a chance and cut the corner to the green or simply hit iron into the fairway. Gone are the days of being able to rip driver fearlessly off the tee, knowing that the hillside will stop any wayward shot."
I'm pretty sure that wasn't happening during those previous US Opens.