On most mornings, I wake up at 5:30 a.m. That’s 0530, also known as “oh-dark-thirty.” My friend Adrian Cronauer, who used to wake up the troops on Armed Services Radio by shouting “G-o-o-o-o-o-d Morning Vietnam,” always said it was called “oh-dark-thirty” because it stood for “oh-my-God it’s early!” It isn’t that early for someone raised on a farm and who spent his later years working for an afternoon paper where people went to work at 7 a.m. Waking up at oh-dark-thirty became second nature, no matter where I was in the world or how tired I might be. Not on...