Mir Rahman weeps as he tells the story of how his brother and nephew were killed by the U.S. forces during a night raid in Jalalabad August 20, 2011. For some, the war has spelt not just uncertainty, but catastrophe. Mir's nephew, Abdullah from eastern Nangarhar province, dreamt of being an interpreter and got good grades until U.S. soldiers arrived at night and shot his father and elder brother. Picture taken August 20, 2011. REUTERS/Ahmad Masood (AFGHANISTAN - Tags: CIVIL UNREST)

An Afghan boy cover his face as he stands next to a window in Walo Tangi village at Kunar Province August 9, 2009. REUTERS/Carlos Barria (AFGHANISTAN CONFLICT)

An Afghan boy stands next to a window in Walo Tangi village at Kunar Province August 9, 2009. REUTERS/Carlos Barria (AFGHANISTAN CONFLICT IMAGES OF THE DAY)

Afghan men talk to a U.S. soldier of the Road Clearance Package (RCP) of the 2-12 Infantry, 4th Brigade during a patrol in the Pesh Valley in Afghanistan's Kunar Province July 30, 2009. REUTERS/Tim Wimborne (AFGHANISTAN CONFLICT)

A supporter of Abdullah Abdullah, one of the 41 candidates for the upcoming Afghan presidential election, attends an electoral rally in Qarabagh district north of Kabul July 21, 2009. Afghanistan's presidential election will be held on August 20. REUTERS/Ahmad Masood (AFGHANISTAN ELECTIONS POLITICS)

Afghan President Hamid Karzai adjusts his hat as he is photographed during his registration to stand for re-election in Kabul May 4, 2009. Karzai officially registered on Monday to stand for re-election, and named current vice president Karim Khalili and former vice president Mohammad Qasim Fahim as his two running mates. REUTERS/Ahmad Masood (AFGHANISTAN POLITICS ELECTIONS IMAGES OF THE DAY) FOR BEST QUALITY IMAGE SEE: GM1E5A21EFZ01

An Afghan cleans a cage for his bird in Kabul April 30, 2009. REUTERS/Ahmad Masood (AFGHANISTAN SOCIETY)

A man carries a sack of potatoes at a market in Dushanbe February 23, 2009. Picture taken February 23, 2009. Plagued by poverty, rampant crime and now collapsing incomes, Tajikistan risks turning into a failed state -- a setback for the West which sees it as a new supply transit point for U.S. troops fighting in neighbouring Afghanistan. To match feature TAJIKISTAN-CRISIS/ REUTERS/Nozim Kalandarov (TAJIKISTAN POLITICS BUSINESS SOCIETY)

Afghan former mujahideens from the northern allies walk in Salang valley on the outskirts of the capital Kabul August 26, 2005.

Imran Khan, cricketer turn politician and Chairman of Pakistan Tehreek-i-Insaaf speaks during an anti-Musharraf rally in Rawalpindi. Imran Khan, cricketer turn politician and Chairman of Pakistan Tehreek-i-Insaaf (PTI) speaks during an anti-Musharraf rally organised by Pakistan's opposition Islamic alliance Muttahida Majlis-e-Amal (MMA) in Rawalpindi December 19, 2004. Islamists vowed on Sunday to resist plans by Pakistan's president to stay on as head of the army, breaking his pledge to quit the post by the end of year. REUTERS/Mian Khursheed pictures of the month December 2004

Imran Khan, cricketer turn politician and Chairman of Pakistan Tehreek-i-Insaaf speaks during an anti-Musharraf rally in Rawalpindi. Imran Khan, cricketer turn politician and Chairman of Pakistan Tehreek-i-Insaaf (PTI) speaks during an anti-Musharraf rally organised by Pakistan's opposition Islamic alliance Muttahida Majlis-e-Amal (MMA) in Rawalpindi December 19, 2004. Islamists vowed on Sunday to resist plans by Pakistan's president to stay on as head of the army, breaking his pledge to quit the post by the end of year. REUTERS/Mian Khursheed