Mass graves. Dismembered corpses. Entire towns besieged. Macabre visions grow in depravity as the drug war in Mexico drags on. Since President Felipe Calderon began using the army to contain the violence four years ago, rival gangs have escalated their turf battles over smuggling routes, and 35,000 lives have been lost, half of those in just the three northern states of Chihuahua, Tamaulipas and Sinaloa. The drug criminals have expanded their shadow by intimidating police forces, using kidnapping and extortion, trafficking migrants, and even pirating oil from Mexico's national oil company, Pemex. Of course, calling this issue "Mexico's drug war" is inadequate. Much of the drug product is destined for the United States, and by some estimates, over $20 billion flows south annually to pay for it. Guns made in the U.S. cross the border as well. The last 16 pictures in this entry were made by Nadav Neuhaus, who was gracious enough to share them with us. Neuhaus spent two years visiting Mexico documenting the drug war. You can see more of his work by clicking on the link below. -- Lane Turner ( 36 photos total