All pics taken yesterday.

U.S. Army soldiers Lt Nicholas Glenn, Sergeant First Class Joel Babb (R) from 2nd Battalion, 35th Infantry Division, Task Force Cacti talk to an Afghan soldier during a patrol in Ghaki Valley in Kunar province, eastern Afghanistan March 14, 2012. Picture taken March 14, 2012. (REUTERS/Erik De Castro)

U.S. Army soldiers from Bravo Company, 2nd Battalion, 35th Infantry Division, Task Force Cacti hug as they pause for a prayer before their platoon go on a patrol in Ghaki Valley in Kunar province, eastern Afghanistan March 14, 2012. Picture taken March 14, 2012. (REUTERS/Erik De Castro)

A U.S. Army soldier from 2nd Battalion, 35th Infantry Division, Task Force Cacti collect empty bullet shells from the turret of an armoured vehicle after briefly engaging the Talibans during a patrol in Ghaki Valley in Kunar province, eastern Afghanistan March 14, 2012. Picture taken March 14, 2012. (REUTERS/Erik De Castro)

A U.S. military Kiowa attack helicopter flies over a part of Sangum Ghaki Valley to provide security for U.S.-Afghan Army soldiers on joint patrol in Kunar province, eastern Afghanistan March 14, 2012. (REUTERS/Erik De Castro)

A U.S. Army soldier from Bravo Company, 2nd Batallion, 35th Infantry Division, Task Force Cacti uses the scope of his rifle to scan an area during a joint patrol with Afghan National Army soldiers in Sangum Ghaki Valley in Kunar province, eastern Afghanistan March 14, 2012. (REUTERS/Erik De Castro)

A masked U.S. Army soldier from 2nd Battalion, 35th Infantry Division, Task Force Cacti mans his weapon on the turret of an armoured vehicle while preparing to leave for a mission outside Forward Operating Base Joyce in Kunar province, eastern Afghanistan March 12, 2012. (REUTERS/Erik De Castro)

A U.S. Army soldier from 2nd Battalion, 35th Infantry Division, Task Force Cacti inspects a machinegun attached to a remote CROW weapon system on the turret of an armoured vehicle at Forward Operating Base Joyce in Kunar province, eastern Afghanistan March 12, 2012. (REUTERS/Erik De Castro)

U.S. military’s Kiowa attack helicopters fly over residential area of Marawara district while providing security for U.S.-Afghan Army soldiers joint patrol in Sangum Ghaki Valley in Kunar province, eastern Afghanistan March 14, 2012. (REUTERS/Erik De Castro)

U.S. Army soldiers from Bravo Company, 2nd Batallion, 35th Infantry Division, Task Force Cacti, take part in a briefing before they go on a patrol in Ghaki Valley in Kunar province, eastern Afghanistan March 14, 2012. Picture taken March 14, 2012. (REUTERS/Erik De Castro)