Left: A drug addict in Kabul smokes for an additional kick after injecting himself with heroin, Aug. 2007. Image: Saurabh Das / AP
Right: An Afghan woman holds up opium as she attends a counseling session at the Nejat drug rehabilitation center, Jan. 2012. Image: Ahmad Masood / Reuters

Left: Male drug addicts sit in the detox room at the Kabul Drug Treatment and Rehabilitation Center, Sept. 2009 in Kabul, Afghanistan. Image: Paula Bronstein / Getty Images
Right: Female drug addicts visit the Nejat drug rehabilitation center in Kabul, Jan. 2012. Image: Ahmad Masood / Reuters

Left: An Afghan drug addict smokes heroin in the city of Ghazni west of Kabul, Afghanistan. Aug. 2007. Image: Musadeq Sadeq / AP
Right: A woman addict sits cross-legged during a counseling session at the Nejat drug rehabilitation center, Jan. 2012. Image: Ahmad Masood / Reuters

Left: An Afghan policeman stands behind a pile of burning illegal narcotics in Kabul, April 2009.
Right: A drug addict waits for her turn to see doctors at the Nejat drug rehabilitation centre in Kabul, Jan. 2012. Images: Ahmad Masood / Reuters

Left: Afghan farmers work in an opium poppy field in Nawa district of Helmand province, south of Kabul, Afghanistan, April 2009. Image: Abdul Khaleq / AP
Right: A drug addict holds her child as she visits the Nejat drug rehabilitation center, Jan. 2012. Image: Ahmad Masood / Reuters

Left: A doctor gives advice to a new detox patient in the Nejat detox program at the Kabul Drug Treatment and Rehabilitation Center, Sept. 2009 in Kabul, Afghanistan. Image: Paula Bronstein / Getty Images
Right: An Afghan doctor explains the use of condoms to a group of women addicts at a counseling session at the Nejat drug rehabilitation center, Jan. 2012. Ahmad Masood / Reuters

Nicholas Weichel, son of Sgt. Dennis Weichel Jr., stands next to his father's casket during funeral services.

An Afghan carries a bundle of wood in Nahr-i Sufi near the DHQ (Char Dara District Police Headquarter) in the province of Kunduz on March 30. The Afghan economy has always been based on agriculture, despite the fact that only 13 percent of its total land is arable and just eight percent is currently cultivated.

Army PFC Forrest Miller kisses his son Parker Miller, 6-months old, held by his wife Britney Miller with the couples' daughter, Jaslene Miller, 4, before Miller boards a bus with other members of the 119th Inland Cargo Transfer Company.

Army 2nd Lt. Brendan Kasony and his wife Joyce say their goodbyes.

Army Spec. Aaron Peterson holds his son, Amir,10-months old, over his head as he says goodbye on March 20.

A musician plays an instrument called a dombura at a celebration of Nowruz, the Persian New Year, in Kabul, Afghanistan on March 20, 2012.

A couple sits on a hill overlooking a celebration of the Nowruz at the Kart-e-Sakhi shrine in Kabul on March 20, 2012.

Afghan security forces block a road leading to the Sakhi Shrine in Kabul on March 20, 2012.

Men raise an Islamic flag called "Alam" at the Sakhi Shrine in Kabul on March 20, 2012.

A boy dances at a celebration of Nowruz in Kabul on March 20, 2012.

A Turkish soldier (2nd from left) and Afghans stand near bodies at the site of a NATO helicopter crash in Kabul March 16. The helicopter crashed into a house on the outskirts of the Afghan capital, Kabul, on Friday, killing 12 Turkish soldiers on board and four Afghan civilians on the ground.

The wreckage of a Turkish Sikorsky military helicopter at the scene where it crashed at the Bagrami district on the outskirts of Kabul, Afghanistan, March 16. Twelve Turkish soldiers were among those killed when a helicopter operated by foreign forces in Afghanistan crashed into a house in Kabul, officials said.

An Afghan villager, right, shows an empty canister allegedly used by US forces during Sunday's killing of civilians at a prayer ceremony for victims in Panjwai, Kandahar province, on March. 13, 2012.

Villagers listen to speeches during a prayer ceremony for victims of Sunday's killing, in Panjwai on March. 13, 2012.

Afghan security forces take up positions in a dried water canal after Taliban militants opened fire on a delegation of senior Afghan officials in Panjwai on March. 13, 2012.

An elderly Afghan man sits next to a covered body, who was allegedly killed by a U.S. service member, in a minibus in Panjwai, Kandahar province south of Kabul, Afghanistan, March 11. Villagers showed an Associated Press photographer 15 bodies, including women and children, and alleged they were killed by the American.