LAS VEGAS — As the years go by, reminders of advancing age increase, and no one who has reached adulthood is spared. When asked about one of those events Monday, U.S. Olympic basketball coach Mike Krzyzewski – who is at the retirement age of 65 – said, “I try not to think about it.” If the person who conceived the term “time flies” wanted to make different age groups feel older, he or she could point out: 1. How painful it has been