By Steve Rushin Cow’s milk remains an iconic—and divisive—symbol in the sports world. Amid an increasingly crowded dairy section, can milk survive? Strength comes in many forms and has many sources. But what does it mean to be strong? We have a few ideas. Check back throughout the week for more. Wilt drank milk. Immediately after he scored 100 points in an NBA game, Wilt Chamberlain toasted the feat with a tall drink befitting a tall man. In the Warriors’ locker room in Hershey, Pa., he reached not for beer or champagne or whiskey but something more suitable to his godlike stature: a half gall…