Afghan National Security Force soldiers patrol with paratroopers from Chosen Company of the 3rd Battalion (Airborne), 509th Infantry on a mission to improve the biological database of men living in Afghanistan's Paktiya Province July 12, 2012. REUTERS/Lucas Jackson (AFGHANISTAN - Tags: CIVIL UNREST MILITARY TPX IMAGES OF THE DAY)

An Afghan army soldier takes up position during a joint patrol with U.S. army soldiers from Delta Company, a part of Task Force 1-66, near the village of Mohammad D'Jakub, Arghandab River valley, Kandahar province, September 13, 2010. REUTERS/Oleg Popov (AFGHANISTAN - Tags: CONFLICT MILITARY)

An Afghan policeman covers his face as a U.S. helicopter prepare to lands at the site of a suicide attack in Kabul October 29, 2011. At least four people were killed when a suicide car bomber attacked a convoy of foreign soldiers in the Afghan capital, Kabul, on Saturday, officials said, with an unspecified number of NATO-led troops among other casualties. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST POLITICS TPX IMAGES OF THE DAY)

A U.S. soldier of Task Force Mountain Warrior take position during a night patrol at the Pesh Valley in Kunar Province August 7, 2009. REUTERS/Carlos Barria (AFGHANISTAN CONFLICT IMAGES OF THE DAY)

An Afghan National Police (ANP) member rests while soldiers from the U.S. Army's 1st Battalion, 41st Infantry Regiment, Task Force Bulldog, take position during a joint patrol in a village in Kherwar district in Logar province, eastern Afghanistan, May 27, 2012. REUTERS/Danish Siddiqui (AFGHANISTAN - Tags: MILITARY POLITICS)

U.S marines patrol in the Garmsir district of Helmand province July 3, 2009. Only scattered clashes were reported on Friday as the Marines fanned out through towns and mud-brick villages in the Helmand River valley, a crescent of opium poppy and wheat fields criss-crossed by canals. REUTERS/Ahmad Masood (AFGHANISTAN MILITARY CONFLICT)

U.S. soldiers from 125 BSB Charlie Medical Company surgical team of Task Force Mustang carry on a stretcher a wounded Afghan National Police Force member who was injured by gun shots from a MEDEVAC helicopter in Forward Operating Base (FOB) Shank in Logar province, eastern Afghanistan November 12, 2011. REUTERS/Umit Bektas (AFGHANISTAN - Tags: CIVIL UNREST MILITARY HEALTH)

Women Afghan Special Forces members participate in a night raid training exercise in Kabul April 11, 2012. It's a special-forces entry like no other and guaranteed to spoil the element of surprise, but Afghanistan's new elite soldiers insist they will be no less effective in countering insurgents than controversial night raids by U.S. Forces. To go with AFGHANISTAN-NIGHTRAIDS/ REUTERS/Mohammad Ismail (AFGHANISTAN - Tags: MILITARY)

U.S. soldiers from 2nd Platoon, Alpha Company, 32nd Infantry Regiment wait to board a Chinook CH-47F transport helicopter at military base "Joyce" on their way to a new location in Bargematal, Nuristan,late August 21, 2009. REUTERS/Oleg Popov (AFGHANISTAN CONFLICT MILITARY IMAGES OF THE DAY)

A U.S. soldier keeps watch as Taliban militants, part of a group of a hundred Afghan Talibans, hand over their weapons as they take part in the Afghan government's reconciliation and reintegration program in Laghman province March 12, 2012. REUTERS/ Parwiz (AFGHANISTAN - Tags: CIVIL UNREST MILITARY POLITICS)

Paratroopers from Chosen Company of the 3rd Battalion (Airborne), 509th Infantry help a sniper get on top of a roof during a mission to improve the biological database of men in Afghanistan's Paktiya Province July 12, 2012. REUTERS/Lucas Jackson (AFGHANISTAN - Tags: CIVIL UNREST MILITARY)

Afghan army soldier Sergeant Mohammad Hassan listens to music from his mobile phone while manning a post with U.S. soldiers from Task Force "No Fear" Alpha Co 2-27 Infantry "The Wolfhounds" inside a bunker at Combat Outpost (COP) Pirtle King in Ghaziabad district in Kunar province, eastern Afghanistan, September 24, 2011. REUTERS/Erik De Castro (AFGHANISTAN - Tags: MILITARY CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY)

NATO and Afghan troops attend to casualties during a battle with Taliban insurgents who took over a building near the U.S. embassy in Kabul September 14, 2011. An assault by Taliban insurgents on the heart of Kabul's diplomatic and military enclave has ended after 20 hours, when security forces killed the last of six attackers, a spokesman for the Ministry of the Interior said on Wednesday. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: CIVIL UNREST MILITARY TPX IMAGES OF THE DAY)

Afghan men watch as a soldier from the Afghan National Army walks by during a joint patrol with U.S. soldiers from Alpha Company, 4th Brigade combat team, 1-508, 82nd Parachute Infantry Regiment in the town of Shah joy in Zabul province, southern Afghanistan, February 12, 2010. REUTERS/Baz Ratner (AFGHANISTAN - Tags: MILITARY CONFLICT)

An Afghan national army soldier rests during a patrol with Canadian and American army soldiers attached to 1st Battalion, 22nd royal regiment in the Panjwai district of Kandahar province in southern Afghanistan June 26, 2011. Canada is winding up combat operations in Afghanistan and all combat troops will leave by the end of July, after nearly ten years fighting in Afghanistan. U.S. President Barack Obama also said on June 22 he would pull 10,000 troops from Afghanistan by year's end, followed by about 23,000 more by the end of next summer and a steady withdrawal of remaining troops after that. REUTERS/Baz Ratner (AFGHANISTAN - Tags: CONFLICT)

U.S. flight medic, SGT Billy Raines from CCO., 1-214 AVN Medevac task force Destiny, treats a wounded Afghan Army soldier during a Medevac flight in southern Afghanistan's Helmand Province November 3, 2010. REUTERS/Peter Andrews (AFGHANISTAN - Tags: POLITICS CONFLICT)

Afghan Army soldiers listen to the U.S. Army base commander speak at Combat Outpost Nolen in the Arghandab Valley north of Kandahar July 29, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY IMAGES OF THE DAY)

An Afghan national policeman conducts in jest a body search of U.S. Cpl. Andrew Davidson with C Troop 1-71 CAV as they arrive at their military base in Gorgan after a patrol in Dand district, south of Kandahar, June 28, 2010. REUTERS/Denis Sinyakov (AFGHANISTAN - Tags: MILITARY)

Members of the Afghan Army take part in a joint patrol with U.S. Army soldiers with the 82nd Airborne Division in Arghandab District, north of Kandahar July 5, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY POLITICS IMAGES OF THE DAY)

An Afghan soldier prepares to fire an M-16 rifle during a training session by U.S. forces in Honaker Miracle camp at the Pesh Valley, Kunar Province August 10, 2009. The Afghan National Army has started the process of changing weapons from the old AK-47 to the American M-16 rifle. REUTERS/Carlos Barria (AFGHANISTAN POLITICS MILITARY)

Afghan National Army soldiers walk on patrol in the town of Shah joy in Zabul province, southern Afghanistan, February 12, 2010. REUTERS/Baz Ratner (AFGHANISTAN - Tags: MILITARY CONFLICT)

U.S. Marines and members of Afghan Army carry an injured Afghan boy to a helicopter during a Medevac mission in southern Afghanistan's Helmand Province November 9, 2010. REUTERS/Peter Andrews (AFGHANISTAN - Tags: MILITARY HEALTH CONFLICT)

Afghani farmers watch as an Afghani National Army soldier helps a U. S Marine from Lima Company, 3rd Battalion, 6th Marines make his way through a poppy field during a patrol in the area of Karez-e-Sayyidi, near Marjah district, Helmand province April 20, 2010. REUTERS/Asmaa Waguih (AFGHANISTAN - Tags: MILITARY CONFLICT)

U.S. Army soldiers from Task Force Bravo 2/151 infantry have lunch at a police station at Dwamanda district in Khowst province, Afghanistan, December 26, 2009. REUTERS/Zohra Bensemra (AFGHANISTAN - Tags: CONFLICT MILITARY IMAGES OF THE DAY)

Shreen Mohammad receives instructions during a military exercise at the Kabul Military Training Center (KMTC) in Kabul April 9, 2012. A landmark NATO summit in Chicago endorsed an exit strategy that calls for handing control of Afghanistan to its own security forces by the middle of next year but left questions unanswered about how to prevent a slide into chaos and a Taliban resurgence after allied troops are gone. Picture taken April 9, 2012. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: POLITICS MILITARY SOCIETY) ATTENTION EDITORS: PICTURE 16 OF 27 FOR PACKAGE 'AFGHAN ARMY RECRUIT'

Afghan National Army soldiers practice hand to hand combat during a military exercise at the Kabul Military Training Center (KMTC) in Kabul March 28, 2012. A landmark NATO summit in Chicago endorsed an exit strategy that calls for handing control of Afghanistan to its own security forces by the middle of next year but left questions unanswered about how to prevent a slide into chaos and a Taliban resurgence after allied troops are gone. Picture taken March 28, 2012. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: POLITICS MILITARY SOCIETY) ATTENTION EDITORS: PICTURE 19 OF 27 FOR PACKAGE 'AFGHAN ARMY RECRUIT'

Afghan National Army soldiers march during the graduation ceremony which marks the completion of nine weeks of training at the Kabul Military Training Center (KMTC) in Kabul May 10, 2012. A landmark NATO summit in Chicago endorsed an exit strategy that calls for handing control of Afghanistan to its own security forces by the middle of next year but left questions unanswered about how to prevent a slide into chaos and a Taliban resurgence after allied troops are gone. Picture taken May 10, 2012. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: POLITICS MILITARY SOCIETY) ATTENTION EDITORS: PICTURE 26 OF 27 FOR PACKAGE 'AFGHAN ARMY RECRUIT'

An Afghan National army soldier keeps watch as a U.S. marine helicopter flies overhead in Khan Neshin district of Helmand province July 8, 2009. U.S. Marines brought Afghan officials to raise the Afghan flag over a formerly Taliban-held valley on Wednesday in a gesture their commander likened to a great victory of World War II. REUTERS/Ahmad Masood (AFGHANISTAN MILITARY CONFLICT POLITICS IMAGES OF THE DAY)

An Afghan National Army (ANA) soldier takes a nap before an early morning joint patrol with U.S. soldiers from 3/1 AD Task Force Bulldog in a village in Kherwar district in Logar province, eastern Afghanistan, May 22, 2012. REUTERS/Danish Siddiqui (AFGHANISTAN - Tags: MILITARY CONFLICT TPX IMAGES OF THE DAY)

A soldier from Alpha Battery of the 2nd Platoon, 2-77 Field Artillery moves powder charges after firing on insurgent positions at FOB Joyce in Afghanistan's Kunar Province June 23, 2012. REUTERS/Lucas Jackson (AFGHANISTAN - Tags: CIVIL UNREST MILITARY)

A U.S Marine and an Afghan policeman search Afghan men for weapons in the Golestan district of Farah province May 8, 2009. REUTERS/Goran Tomasevic (AFGHANISTAN MILITARY IMAGES OF THE DAY)

An Afghan policeman carries a poppy flower in the barrel of his gun, in the Maiwand district of Kandahar province, southern Afghanistan April 9, 2012. Picture taken April 9, 2012
. REUTERS/Baz Ratner (AFGHANISTAN - Tags: MILITARY CRIME LAW CONFLICT)

A soldier from the U.S. Army's 1st Battalion, 41st Infantry Regiment, Task Force Bulldog fires at a Taliban position after they attacked the Combat Outpost (COP) Boston in Kherwar district in Logar province, eastern Afghanistan, May 25, 2012. REUTERS/Danish Siddiqui (AFGHANISTAN - Tags: MILITARY POLITICS)

Afghan National Army soldiers run to cover themselves at the site of an attack on the outskirts of Kabul June 22, 2012. Gunmen took scores of hostages at a popular lakeside hotel on the outskirts of the Afghan capital, police said on Friday, during a deadly attack lasting several hours that underscored the Taliban's potency despite more than a decade of war. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST MILITARY POLITICS)

A member of the Afghan security uses a pair of binoculars near the site of an attack on the outskirts of Kabul June 22, 2012. Gunmen took scores of hostages at a popular lakeside hotel on the outskirts of the Afghan capital, police said on Friday, during a deadly attack lasting several hours that underscored the Taliban's potency despite more than a decade of war. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST MILITARY POLITICS)

U.S. soldier Nicholas Dickhut from 5-20 infantry Regiment attached to 82nd Airborne points his rifle at a doorway after coming under fire by the Taliban while on patrol in Zharay district in Kandahar province, southern Afghanistan April 26, 2012. REUTERS/Baz Ratner (AFGHANISTAN - Tags: MILITARY TPX IMAGES OF THE DAY)

An Afghan policeman keeps watch during a protest near a U.S. military base in Kabul February 22, 2012. Several people were wounded on Wednesday, witnesses said, when shots were fired as hundreds of angry Afghans gathered in a second day of violent clashes after copies of the Koran, Islam's holy book, were burned at NATO's main base in Afghanistan. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: CIVIL UNREST RELIGION)

A member of the Afghan Security Group, a local militia force, sleeps with his weapon at Observation Post Mustang in Afghanistan's Kunar Province June 5, 2012. REUTERS/Tim Wimborne (AFGHANISTAN - Tags: CIVIL UNREST MILITARY CONFLICT)

Soldiers with the U.S. Army's 1-320 Field Artillery Regiment, 101st Airborne Division shield themselves from the dust as a Medivac helicopter takes off outside Combat Outpost Nolen in the Arghandab Valley north of Kandahar July 30, 2010. One soldier lost his leg and another was hit by shrapnel after an Improvised Explosive Device (IED) blew up during a patrol near the base. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY IMAGES OF THE DAY)

An Afghan Special Forces policeman (L) and U.S soldiers search an abandoned school for Taliban fighters in the village of Sanjaray in Zhari district early April 26, 2008. REUTERS/Goran Tomasevic (AFGHANISTAN)