Afghan refugees and internally displaced Pakistani schoolgirls attend class at a makeshift school on the outskirts of Islamabad, Pakistan, Monday, January 12, 2015. Pakistani children and staff returned to a school in northwestern Pakistan where Taliban gunmen nearly a month ago killed 150 people – almost all of them students. (Photo by Muhammed Muheisen/AP Photo)

Afghan money changer, left, counts a pile of currency at the Money and Exchange Market in Kabul, Afghanistan, Monday, January 12, 2015. The Afghanistan's currenct, the Afghani, stands at 57.60 against the U.S. dollar. (Photo by Massoud Hossaini/AP Photo)

An Afghan refugee child pumps water from a well, while waiting her elder sister in a slum on the outskirts of Islamabad, Pakistan, Sunday, January 11, 2015. (Photo by Muhammed Muheisen/AP Photo)

An Afghan man prepares tea for customers at a roadside tea shop during the early morning hours in Kabul, January 11, 2015. (Photo by Omar Sobhani/Reuters)

An Afghan man has his breakfast at a roadside tea shop during the early morning hours in Kabul, January 11, 2015. (Photo by Omar Sobhani/Reuters)

Afghan men place bread for sale at a market during the early morning hours in Kabul, January 11, 2015. (Photo by Omar Sobhani/Reuters)

Afghans sell onions and potatoes along a street in Kabul January 12, 2015. (Photo by Omar Sobhani/Reuters)

An Afghan man waits for customers at a dried fruit market in Kabul January 12, 2015. (Photo by Omar Sobhani/Reuters)

An Afghan butcher sells buffalo legs along a street in Kabul January 12, 2015. (Photo by Omar Sobhani/Reuters)

Afghan security personnel investigate the site of a blast in Kabul January 13, 2015. The Taliban claimed responsibility for the car bomb attack that killed two people in the capital, Kabul, on Tuesday. (Photo by Mohammad Ismail/Reuters)

Afghan security personnel investigate the site of a blast in Kabul January 13, 2015. (Photo by Mohammad Ismail/Reuters)

An internally displaced Afghan girl plays near their shelter at a refugee camp in Kabul January 13, 2015. (Photo by Omar Sobhani/Reuters)

Afghan boys play soccer in Kabul January 14, 2015. (Photo by Mohammad Ismail/Reuters)

Boys who sell water react to the camera at a cemetery in Kabul January 14, 2015. (Photo by Mohammad Ismail/Reuters)

An Afghan girl walks through a cemetery in Kabul January 14, 2015. (Photo by Mohammad Ismail/Reuters)

Afghan refugee Fatima Wakeel, 7, washes her laundry in a polluted stream on the outskirts of Islamabad, Pakistan, Wednesday, January 14, 2015. (Photo by Muhammed Muheisen/AP Photo)

Afghan refugees and internally displaced Pakistani children attend their daily Madrassa, or Islamic school, at a mosque on the outskirts of Islamabad, Pakistan, Wednesday, January 14, 2015. (Photo by Muhammed Muheisen/AP Photo)

Afghan refugee children play in a slum on the outskirts of Islamabad, Pakistan, Wednesday, January 14, 2015. (Photo by Muhammed Muheisen/AP Photo)

Afghan children who work as water vendors search for customers at the Kart-e-Sakhi cemetery in Kabul on January 12, 2015. Thousands of victims of the country's civil war which raged from 1992 to 1996 are buried in cemetries across the Afghan capital. (Photo by Shah Marai/AFP Photo)