The Border: Journeys along the U.S.-Mexico Border, the World's Most Consequential Divide

David Danelo spent three months traveling the 1,952 miles that separate the United States and Mexico--a journey that took him across four states and two countries through a world of rivers and canals, mountains and deserts, highways and dirt roads, fences and border towns. Here the border isn't just an abstraction thrown around in political debates in Washington; it's a physical reality, infinitely more complex than most politicians believe.

Danelo's investigative report about a complex, lo...