Mike Krzyzewski would be at or near the top of any short list ranking history’s best college basketball coaches. He won more games than any other coach in his 46-year career, leading Duke University to five men’s national championships. He also won Olympic Gold Medals coaching Team USA, and prepared countless young men for their post-college careers on and off the court. Now two years into retirement, “Coach K” talks about how he spends his free time, and his newfound affinity for grocery shopping.