We are outside Ramadi, clearing a route none of us has driven before, and that alone is enough to put everyone on edge. The usual roads are paved; you learn how to read them over time, learn the language of fresh asphalt and disturbed dirt, the subtle signs that something has been opened and closed again. But this road offers no such cues. It's unpaved, a supply line cutting through open terrain, stripped of landmarks or patterns, giving us nothing familiar to anchor to.The streets...