An anti-riot policeman looks for protesters during clashes with protesters in Kabul February 24, 2012. Nine more people were killed on Friday in protests in Afghanistan over the burning of copies of the Koran at a NATO base, officials said. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: RELIGION CIVIL UNREST) 

Gul Bibi, the mother of Abdul Saboor, the chief suspect in the murder of two U.S. officers at the Interior Ministry, speaks during an interview in Salang district, Parwan province, February 28, 2012. Family and friends are baffled how a policeman who grew up in one of Afghanistan's most peaceful areas may have carried out the high-profile murder of two U.S. officers that has rattled NATO and the Kabul government. Picture taken February 28, 2012. REUTERS/Mohammad Ismail (AFGHANISTAN - Tags: CRIME LAW POLITICS CIVIL UNREST) 

An Afghan doctor walks inside a hospital with bloodstained clothes in Laghman province February 25, 2012. Four people were shot dead by Afghan security forces on Saturday as protests over the burnings of the Muslim holy book at a NATO base erupted for a fifth day, with an attempt by demonstrators to bombard a U.N. compound in the north. REUTERS/Parwiz (AFGHANISTAN - Tags: CIVIL UNREST RELIGION POLITICS HEALTH) 

An Afghan boy who works at a bakery watches a protest outside his a window in Kabul February 24, 2012. Twelve people were killed on Friday in the bloodiest day yet in protests that have raged across Afghanistan over the desecration of copies of the Muslim holy book at a NATO military base with riot police and soldiers on high alert braced for more violence. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: RELIGION CIVIL UNREST TPX IMAGES OF THE DAY) 

Afghan protesters shout anti-U.S. slogans during a protest at a mosque in the city of Herat February 23, 2012. An Afghan soldier joined protests on Thursday against the burning of copies of the Koran at a NATO base and shot dead two foreign troops, Western military sources said, as the Taliban urged security forces to turn their guns on foreigners. REUTERS/Mohammad Shoib (AFGHANISTAN - Tags: CIVIL UNREST RELIGION) 

Afghan policemen march towards protesters 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 TPX IMAGES OF THE DAY) 

Afghans mourn during a funeral ceremony as they carry the coffins of victims Tuesday's bomb attack against Shi'ite Muslims in Kabul December 7, 2011. Hundreds of Shi'ite Muslims attended the funeral ceremony, saying the victims had died in the name of the Prophet Mohammad because they were killed at a Muslim ceremony. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST RELIGION POLITICS TPX IMAGES OF THE DAY) 

U.S. Army soldiers sit behind a wall as others search for explosives after an IED (improvised explosive device) blast damaged one of their armoured vehicles during a road clearance patrol in Logar province, eastern Afghanistan November 23, 2011. Picture taken November 23, 2011. REUTERS/Umit Bektas (AFGHANISTAN - Tags: MILITARY POLITICS TPX IMAGES OF THE DAY) 

Medical staff of 125 BSB Forward Surgical Team Task Force Mustang treat a wounded Afghan civilian, injured by an IED (improvised explosive device) in Forward Operating Base (FOB) Shank, in Logar province, eastern Afghanistan November 10, 2011. REUTERS/Umit Bektas (AFGHANISTAN - Tags: CIVIL UNREST MILITARY HEALTH) 

An Afghan police officer inspects the damage after a suicide bomb attack followed by a gun battle between insurgents and U.S. and Afghan forces at a building used by the Office of the United Nations High Commissioner for Refugees (UNHCR) in Kandahar October 31, 2011. Three Afghans including a police officer were killed in a suicide attack in the southern Afghan city of Kandahar early on Monday, the interior ministry said, two days after a deadly bombing in the capital. REUTERS/Ahmad Nadeem (AFGHANISTAN - Tags: CIVIL UNREST POLITICS) 

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 man mourns the death of his brother, who was killed in a fuel tanker blast, in Parwan province, north of Kabul October 26, 2011. At least 10 Afghan civilians were killed and 35 wounded on a road near a major U.S. base after a small bomb punctured a hole in the side of a fuel tanker that was later engulfed by a large blaze, eyewitnesses and officials said on Wednesday. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: CIVIL UNREST TPX IMAGES OF THE DAY) 

U.S. soldiers from Task Force "No Fear", Alpha Company, 2-27 Infantry "The Wolfhounds", fire a 120mm mortar at a Taliban position from Combat Outpost (COP) Pirtle King in Ghaziabad district, Kunar province, eastern Afghanistan September 26, 2011. REUTERS/Erik De Castro (AFGHANISTAN - Tags: MILITARY CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY) 

Residents cheer as a U.S. soldier from Task Force Bronco, 3rd Squadron, 4th Cavalry Regiment, entertains them with dance moves during a patrol in Rodat district in Jalalabad, Afghanistan September 5, 2011. Reuters/Erik de Castro (AFGHANISTAN - Tags: POLITICS SOCIETY MILITARY) 

Afghan President Hamid Karzai (2nd L) embraces a would-be child suicide bomber after Eid-al-Fitr prayers during a ceremony to mark the release of eight detained would-be child suicide bombers, at the presidential palace in Kabul August 30, 2011. Eid al-Fitr celebrates the end of Ramadan, the Islamic holy month of fasting. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: POLITICS RELIGION CIVIL UNREST) 

Three captured Taliban insurgents are presented to the media in Ghazni province August 25, 2011. REUTERS/Mustafa Andaleb (AFGHANISTAN - Tags: CIVIL UNREST POLITICS IMAGES OF THE DAY) 

Afghan President Hamid Karzai looks down at the grave of his brother Ahmad Wali Karzai during his burial ceremony in Kandahar province July 13, 2011. Afghan President Hamid Karzai wept and kissed his dead brother's face as thousands of mourners gathered on Wednesday for the burial of Ahmad Wali Karzai, whose assassination a day earlier has left a power vacuum in Afghanistan's volatile south. REUTERS/Ahmad Nadeem (AFGHANISTAN - Tags: POLITICS SOCIETY IMAGES OF THE DAY CIVIL UNREST) 

U.S. Army soldiers from 2-35 infantry battalion kneel during a memorial ceremony in forward firebase Joyce in Kunar province, July 7, 2011. Four U.S. Army soldiers, Lieutenant Dimitri Del Castillo, Staff Sergeant Nigel Kelly, Specialist Levi Nuncio and Specialist Kevin Hilaman, two Afghan National Army soldiers, an Afghan linguist and Agdar, a military sniffer dog died during operations in Kunar district in the last week of June 2011. REUTERS/Baz Ratner (AFGHANISTAN - Tags: CONFLICT MILITARY) 

U.S. Army soldiers from the 2nd Platoon, B battery 2-8 field artillery, fire a howitzer artillery piece at Seprwan Ghar forward fire base in Panjwai district, Kandahar province southern Afghanistan, June 12, 2011. REUTERS/Baz Ratner (AFGHANISTAN - Tags: CONFLICT MILITARY IMAGES OF THE DAY POLITICS) 

A female officer from Officer Candidate School at Kabul Military Training Centre stands next to her bed as high ranking officials from the defense ministry arrives to inspect the school after their graduation ceremony in Kabul May 19, 2011. The female officers graduated after a 20-week course including computer training, human resources training, English classes and marksmanship. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: MILITARY POLITICS IMAGES OF THE DAY) 

An Afghan girl whose family members were killed overnight after a raid by NATO and Afghan forces, covers her face as she weeps during a protest in Taloqan May 18, 2011. Ten people have been killed and fifty wounded in violent protests against the killing of two men and two women in a night-time raid in north Afghanistan, a top local health official said. REUTERS/Wahdat (AFGHANISTAN - Tags: CIVIL UNREST POLITICS IMAGES OF THE DAY) 

Taliban militants join the Afghan government's reconciliation and reintegration program, in Kandahar April 11, 2011. Some 50 Taliban insurgents who have fought Afghan and foreign troops for years, have defected to the government in Afghanistan's southern Kandahar on Monday, where they hailed Kabul's push for peace and reconciliation. REUTERS/Ahmad Nadeem (AFGHANISTAN - Tags: CIVIL UNREST POLITICS) 

U.S. Army SPC Jeremy Stocks from "Dustoff" team, C Company, 1-214 Aviation Regiment, 101st Combat Aviation Brigade restores a flagpole back in place after the flagpole fell in a night sandstorm at Camp Dwyer in Helmand province, Afghanistan, April 10, 2011. REUTERS/Denis Sinyakov (AFGHANISTAN - Tags: MILITARY POLITICS IMAGES OF THE DAY CONFLICT) 

U.S. Army medic SSG Quincy Northern from "Dustoff" team, C Company, 1-214 Aviation Regiment, 101st Combat Aviation Brigade walks toward his medevac helicopter as it casts a shadow on a hospital wall at Camp Dwyer in Helmand province, Afghanistan, April 5, 2011. REUTERS/Denis Sinyakov (AFGHANISTAN - Tags: CONFLICT MILITARY HEALTH IMAGES OF THE DAY) 

U.S. Marines from the First Batallion Eigth Marines Alpha Company stop during a patrol to speak with villagers at Kunjak in southern Afghanistan's Helmand province, February 19, 2011. REUTERS/Finbarr O'Reilly (AFGHANISTAN - Tags: CONFLICT MILITARY) 

An Afghan policeman keeps watch after a suicide attack in Kabul December 19, 2010. Five Afghan army training officers were killed and nine wounded in an attack by two Taliban suicide bombers in Kabul on Sunday, the Defence Ministry said. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: CIVIL UNREST MILITARY IMAGES OF THE DAY) 

A father wipes a tear away from his child's face during a Medevac mission in southern Afghanistan's Helmand province November 13, 2010. The child was injured by an explosion. REUTERS/Peter Andrews (AFGHANISTAN - Tags: CONFLICT MILITARY IMAGES OF THE DAY) 

Graffiti left behind by Taliban fighters remains on the walls of a compound now used as a command center for the U.S Marine Corps's First Battalion, Eighth Marines at Musa Qala in southern Afghanistan's Helmand province, November 10, 2010.Musa Qala is an important battleground in the war against Taliban insurgents and the narcotics industry. The town has changed hands several times, most recently in December 2007 when Afghan and international forces retook the town from the Taliban. REUTERS/Finbarr O'Reilly (AFGHANISTAN - Tags: MILITARY CONFLICT SOCIETY IMAGES OF THE DAY) 

A machine gunner from the First Battalion, Eighth Marines Bravo Company wears a bandolier of bullets around his neck at his base in Talibjan after a patrol in southern Afghanistan's Helmand province, November 9, 2010. REUTERS/Finbarr O'Reilly (AFGHANISTAN - Tags: MILITARY CONFLICT IMAGES OF THE DAY) 

An Afghan man is detained by U.S. Marines from the First Battalion, Eighth Marines Bravo Company at their base in Talibjan after a battle against Taliban insurgents in Musa Qala district in southern Afghanistan's Helmand province November 7, 2010. REUTERS/Finbarr O'Reilly (AFGHANISTAN - Tags: CONFLICT CIVIL UNREST IMAGES OF THE DAY) FOR BEST QUALITY IMAGE: ALSO SEE GM1E6CH1LJK01. 

Private First Class Brandon Voris, 19, of Lebanon, Ohio, from the First Battalion Eighth Marines Alpha Company stands in the middle of his camp as a sandstorm hits his remote outpost near Kunjak in southern Afghanistan's Helmand province, October 28, 2010. REUTERS/Finbarr O'Reilly (AFGHANISTAN - Tags: CONFLICT CIVIL UNREST ENVIRONMENT IMAGES OF THE DAY) 

Afghan children stand together near the town of Kunjak in southern Afghanistan's Helmand province October 24, 2010. REUTERS/Finbarr O'Reilly (AFGHANISTAN - Tags: SOCIETY CONFLICT IMAGES OF THE DAY) 

Residents on horse-led carts hurry past burning fuel tankers along the GT Road near Nowshera, located in Pakistan's Khyber-Pakhtunkhwa Province October 7, 2010. Gunmen in Pakistan set fire to up to 40 supply trucks for NATO troops in Afghanistan on Wednesday, police said. REUTERS/Adrees Latif (PAKISTAN - Tags: POLITICS CIVIL UNREST IMAGES OF THE DAY) 

A worker waits as goods are unloaded from his vehicle next to a street in Kabul September 17, 2010. REUTERS/Andrew Biraj (AFGHANISTAN - Tags: SOCIETY IMAGES OF THE DAY) FOR BEST QUALITY IMAGE SEE: GM1E6AT1EX201 

A donkey transports ballot boxes to villages unreachable by vehicles in Panjshir province, north of Kabul September 17, 2010. Afghanistan will hold parliamentary elections on September 18. REUTERS/Ahmad Masood (AFGHANISTANELECTIONS DAY - Tags: ELECTIONS POLITICS ANIMALS IMAGES OF THE DAY) 

New female recruit of the Afghan National Police (ANP) aims her weapon during a training session in a police base south of Herat, western Afghanistan September 16, 2010. REUTERS/Raheb Homavandi (AFGHANISTAN - Tags: POLITICS CIVIL UNREST) 

An Afghan policeman shouts orders as they charge towards protesters in Kabul September 15, 2010. Police fired into the air to disperse thousands of angry anti-American protesters in Afghanistan's capital on Wednesday, witnesses and police said, with at least two people suffering apparent gunshot wounds. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: CIVIL UNREST POLITICS) 

An Italian soldier of NATO's International Security Assistance Force (ISAF) stands guard as an Afghan boy aims a toy pistol inside Herat's prison, western Afghanistan September 14, 2010. REUTERS/Raheb Homavandi (AFGHANISTAN - Tags: MILITARY SOCIETY IMAGES OF THE DAY) 

A U.S. Marine from 1st Light Armoured Reconnaisance Battalion, Bravo Company is shrouded in dust while travelling in an armoured vehicle in the desert of Helmand September 10, 2010. REUTERS/Erik de Castro (AFGHANISTAN - Tags: MILITARY IMAGES OF THE DAY POLITICS) 

A damaged campaign poster for an Afghan woman parliament candidate is seen on a wall in Herat, western Afghanistan September 8, 2010. Taliban threats, shuttered polling centres and warnings of widespread fraud are clouding hopes for Afghanistan's Sept. 18 parliamentary election, a key test of an already fragile democracy, observers have warned. REUTERS/Raheb Homavandi (AFGHANISTAN - Tags: POLITICS ELECTIONS) BEST QUALITY AVAILABLE 

A worker cleans a picture on the monument built in memory of assassinated anti-Taliban Afghan rebel leader Ahmad Shah Masood to mark the ninth anniversary of his death, in Kabul September 8, 2010. The former Northern Alliance general was assassinated by Al Qaeda agents two days before the September 11, 2001 attacks, and is revered by many Afghans. REUTERS/Andrew Biraj (AFGHANISTAN - Tags: CIVIL UNREST ANNIVERSARY) 

A U.S. Army medevac crew member attempts to revive a Marine mortally wounded in an IED (improvised explosion device) blast near the town of Marjah in Helmand province in this picture taken August 22, 2010. Picture taken August 22, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY POLITICS IMAGES OF THE DAY) 

Canadian soldiers play table football under flashlights at a military outpost near the village of Bazaar e Panjwaii, in the Panjwaii district of Kandahar province August 8, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY) 

Cpl Ryan Belgrave with the Canadian Army's 1st Battalion, The Royal Canadian Regiment Battle Group, walks through a field of marijuana plants during a patrol near the village of Salavat, in the Panjway district west of Kandahar August 4, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY) 

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) 

Soldiers with the US Army's 1-320 Field Artillery Regiment, 101st Airborne Division work to save a comrade after an Improvised Explosive Device (IED) exploded just outside Combat Outpost Nolen in the Arghandab Valley north of Kandahar July 30, 2010. One soldier lost a leg in the blast and another was wounded in the face by shrapnel. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY IMAGES OF THE DAY) 

An Afghan Army soldier fires a rocket propelled grenade (RPG) at suspected Taliban militants as US Army soldiers crouch down at Combat Outpost Nolen in the Arghandab Valley north of Kandahar July 27, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY IMAGES OF THE DAY) 

A soldier with an injured ankle from the US Army's 1-320 Field Artillery Regiment, 101st Airborne Division is assisted past his burning M-ATV armored vehicle after it struck an Improvised Explosive Device (IED) on a road near Combat Outpost Nolen in the Arghandab Valley in this picture taken July 23, 2010. None of the four soldiers in the vehicle were seriously injured in the explosion. Picture taken July 23, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY IMAGES OF THE DAY) FOR BEST QUALITY IMAGE ALSO SEE: GF20000045307 

1st Sgt Buddy Hartlaub with the US Army's 1-320 Field Artillery Regiment, 101st Airborne Division stands before a memorial to Spc 1st Class Brandon King at Combat Outpost Terra Nova in the Arghandab Valley north of Kandahar, July 20, 2010. King was shot and killed by a suspected Taliban militant while on guard duty at Combat Outpost Nolen on July 14. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY) 

A group of men detained for suspected Taliban activities are held for questioning at a schoolhouse in the village of Kuhak in Arghandab District, north of Kandahar July 9, 2010. REUTERS/Bob Strong (AFGHANISTAN - Tags: CONFLICT MILITARY) 

Two young boys are handcuffed at a local liquor factory in Kabul June 29, 2010. Afghan police raided an illicit liquor factory capable of producing dozens of litres of alcohol a day and arrested a moonshiner and two young helpers, officials said on Tuesday. REUTERS/Omar Sobhani (AFGHANISTAN - Tags: CRIME LAW SOCIETY) 

Afghans soccer players gather in front of the destroyed Darul Aman palace in Kabul June 1, 2010. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: SPORT SOCIETY SOCCER) 

Monica McNeal (R) cries as she hugs a U.S. Marine at the grave (L) of her 19-year-old son Eric Ward, at Arlington National Cemetery, May 27, 2010. Lance Corporal Eric Ward, a fourth-generation U.S. Marine, was killed in Afghanistan on February 21, 2010. The United State is commemorating Memorial Day this weekend. REUTERS/Jason Reed (UNITED STATES - Tags: MILITARY IMAGES OF THE DAY) 

Doctors help a wounded man at a hospital after a suicide car bomb attack in Kabul May 18, 2010. At least five NATO-led foreign troops were killed in the suicide car bomb attack in the Afghan capital on Tuesday, police source said. REUTERS/ Omar Sobhani (AFGHANISTAN - Tags: CIVIL UNREST) 

Canadian Army soldiers carry a coffin containing the body of their comrade Petty Officer Second Class Douglas Craig Blake during a ramp ceremony at Kandahar Airfield NATO base May 5, 2010. Blake was killed by an improvised explosive device that detonated in Panjwa'i District some 25 km (16 miles) southwest of Kandahar City on May 3. REUTERS/Nikola Solic (AFGHANISTAN - Tags: POLITICS MILITARY IMAGES OF THE DAY) 

Afghan National Army (ANA) soldiers carry explosives during preparations to destroy more than 1500kg (3307 lbs) of ammonium nitrate fertiliser which is used in making bombs in Afghanistan, outside Kabul city April 21, 2010. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: CRIME LAW CIVIL UNREST MILITARY) 

An armoured vehicle from the Centurion Company, 2-1 Infantry Battalion, 5/2 Stryker Brigade Combat Team is framed by a bolt of lightning during a storm at Combat Outpost Terminator in Maiwand District, Kandahar Province April 19, 2010. REUTERS/Tim Wimborne (AFGHANISTAN - Tags: MILITARY ENVIRONMENT IMAGES OF THE DAY) 

U.S. Marines Staff Sgt. Benito Garcia and Lcpl Chris Vavrecka from Lima Company, 3rd Battalion, 6th Marines train in mix martial arts at their patrol base in the area of Karez-e-Sayyidi, near Marjah district, Helmand province, April 18, 2010. Picture taken April 18, 2010. REUTERS/Asmaa Waguih (AFGHANISTAN - Tags: MILITARY POLITICS) 

Soldiers from the U.S. Army's 3-17 Field Artillery, 5-2ID Striker Brigade Combat Team fire a 155mm Howitzer at night from Forward Operating Base Ramrod in Kandahar Province April 13, 2010. REUTERS/Tim Wimborne (AFGHANISTAN - Tags: MILITARY CONFLICT) 

A U. S Marine from Lima company 3rd bn 6th Marines rests while waiting during a patrol in the area of Karez-e-Sayyidi, in Helmand province, April 8, 2010. REUTERS/Asmaa Waguih (AFGHANISTAN - Tags: CIVIL UNREST POLITICS)