On a U.S. military base near Fallujah in war-torn Iraq, Col. John Folsom woke up one morning to the sound of a small, scruffy donkey tied up outside his quarters. He was charmed by this scrawny animal with a plaintive expression. Folsom and his fellow Marines took in the donkey, built him a corral and shelter, and escorted him on daily walks. One night, hanging out with the Marines as they relaxed after work, the donkey snatched someone s lit cigarette and gobbled it up, to the laughter of all. Suddenly, the donkey had a name: Smoke. More than a conversation topic for troops connecting with...