ADVANCE FOR USE SUNDAY, JAN. 6, 2012 AND THEREAFTER - This Thursday, Nov. 15, 2012 aerial photo shows the Helmand River in Helmand province, south of Kabul, Afghanistan. In the approaching twilight of its war in Afghanistan, the U.S. is forging ahead with a giant infrastructure project long criticized as too costly in both blood and money. (AP Photo/Heidi Vogt)
