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Sakina waits for a teacher to recite verses from the Quran during religion class at a local mosque in Islamabad, Pakistan, Thursday, Dec. 19, 2013. Religious schools in Pakistan mostly set up in mosques are potential source of education for thousands of children.

B.K. Bangash/AP

Sakina waits for a teacher to recite verses from the Koran during religion class at a local mosque in Islamabad, Pakistan. Religious schools in Pakistan mostly set up in mosques are potential source of education for thousands of children.

A Pakistani woman walks out of her home carrying her child towards a health worker to be vaccinated against polio in Islamabad, Pakistan, Monday, Nov. 25, 2013. On Saturday, militants kidnapped four school teachers who were working on a polio vaccination drive in Khyber's Sipah village, said local government official Khurshid Khan. Negotiations are underway for their release, he said. Militants have killed over a dozen polio workers and police protecting them over the last year and they claim the workers are spies and the vaccination is meant to make Muslim children sterile.

Muhammed Muheisen/AP

A woman in Islamabad, Pakistan, takes her child to a health worker to be vaccinated against polio. More than a dozen polio vaccine workers have been killed by militants in the past year in the country. They claim the workers are spies and the vaccination is intended to make Muslim children sterile.

Pakistani youth, Daniel Rahmat, 12, who works as a street barber, sits on his chair waiting for customers, on the outskirts of Islamabad, Pakistan, Thursday, Nov. 7, 2013.

Muhammed Muheisen/AP

Street barber Daniel Rahmat, 12, waits for customers on the outskirts of Islamabad, Pakistan.

An Afghan refugee youth, sits on the side of the alley of a poor neighborhood, on the outskirts of Islamabad, Pakistan, Tuesday, Oct. 29, 2013. Pakistan hosts over 1.6 million registered Afghans, the largest and most protracted refugee population in the world, according to the U.N. refugee agency, thousands of them still live without electricity, running water and other basic services.

Muhammed Muheisen/AP

A young Afghan refugee sits on the side of an alley in a poor neighbourhood on the outskirts of Islamabad, Pakistan.

A Pakistani girl comforts her brother near her family's makeshift tent in a slum in Islamabad, Pakistan, Monday, Oct. 21, 2013. Slums, which are built on illegal lands, have neither running water or sewage disposal.

Muhammed Muheisen/AP

A girl holds her brother near her family’s makeshift tent in a slum in Islamabad, Pakistan

An Afghan refugee child sits on roadside in a poor neighborhood on the outskirts of Islamabad, Pakistan, Monday, Oct. 14, 2013. Pakistan hosts over 1.6 million registered Afghans, the largest and most protracted refugee population in the world, according to the U.N. refugee agency, thousands of them still live without electricity, running water and other basic services.

Muhammed Muheisen/AP

An Afghan refugee child sits on the roadside on the outskirts of Islamabad, Pakistan. Pakistan hosts more than 1.6m registered Afghans, the largest and most protracted refugee population in the world, according to the UN refugee agency, Thousands of refugees still live without electricity, running water and other basic services.

Pakistani boy, Saad Imran, 6, walks his painted sheep back home, to be slaughtered  on the upcoming Muslim holiday of Eid al-Adha, or "Feast of Sacrifice," in Islamabad, Pakistan, Friday, Oct. 11, 2013. Marks on the sheep reads, Eid, or "Feast, " referring to the holiday.

Muhammed Muheise/AP

Saad Imran, aged 6, on Friday walks his sheep home to be slaughtered on the upcoming Muslim holiday of Eid al-Adha in Islamabad, Pakistan.

A boy recites from a book during a lesson at a school in a slum on the outskirts of Islamabad on Friday.

Zohra Bensemr/Reuters

A boy recites from a book during a lesson at a school in a slum on the outskirts of Islamabad on Friday.

Girls read books containing short verses from the Koran in a madrasa on the outskirts of Islamabad

Reuters

Girls read books containing short verses from the Koran in a madrasa, or religious school, on the outskirts of Islamabad 

An Afghan refugee, her burka billowing, holds her daughter as she walks to her home through an alley of a poor neighborhood on the outskirts of Islamabad, Pakistan, Monday, Sept. 16, 2013. Pakistan hosts over 1.6 million registered Afghans, the largest and most protracted refugee population in the world, with thousands living without electricity, running water and other basic services, according to the U.N. refugee agency. (AP Photo/Muhammed Muheisen)

Muhammed Muheise/AP

An Afghan refugee, her burka billowing, holds her daughter as she walks to her home through an alley of a poor neighbourhood on the outskirts of Islamabad, Pakistan. 

A Pakistani student of a madrassa, or Islamic school, attends a test in reciting verses of the Quran, during the Muslim holy fasting month of Ramadan, in a Mosque in Islamabad, Pakistan, Monday, July 22, 2013. Muslims throughout the world are marking the month of Ramadan, the holiest month in Islamic calendar. (AP Photo/Muhammed Muheisen)A Pakistani student of a madrassa, or Islamic school, attends a test in reciting verses of the Quran, during the Muslim holy fasting month of Ramadan, in a Mosque in Islamabad, Pakistan, Monday, July 22, 2013. Muslims throughout the world are marking the month of Ramadan, the holiest month in Islamic calendar. (AP Photo/Muhammed Muheisen)

Muhammed Muheisen/AP

A Pakistani student of a madrassa, or Islamic school, attends a test in reciting verses of the Koran, during the Muslim holy fasting month of Ramadan, in a mosque in Islamabad on Monday 

An elderly Pakistani woman holds a plastic bag, while standing at a window of a food distribution center, hoping to receive a ration of rice at a shrine in Islamabad, Pakistan, Friday, June 7, 2013. People who visit shrines and pray that their wishes are fulfilled usually offer food to be distributed to the poor.

Muhammed Muheisen/AP

An elderly Pakistani woman holds a plastic bag, while standing at a window of a food distribution centre, hoping to receive a ration of rice at a shrine in Islamabad, Pakistan, on Friday. People who visit shrines and pray that their wishes are fulfilled usually offer food to be distributed to the poor 

A Pakistani army soldier, guards election material provided to polling agents for tomorrow's elections, in Islamabad, Pakistan, Friday, May 10, 2013. An especially violent spate of killings, kidnappings and bombings marred the run-up to Pakistan's nationwide election, capped Thursday by the abduction of the son of a former prime minister as he was rallying supporters on the last day of campaigning before the historic vote.

B.K. Bangash/AP

A Pakistani army soldier guards election material provided to polling agents for Saturdays elections, in Islamabad, Pakistan. An especially violent spate of killings, kidnappings and bombings marred the run-up to Pakistan’s nationwide election, capped on Thursday by the abduction of the son of a former prime minister as he was rallying supporters on the last day of campaigning before the historic vote.

A Pakistani supporter of former cricket star-turned-politician, and leader of Pakistan Tehreek-e-Insaf party, Imran Khan, takes part during a rally in Khan's support in Islamabad, Pakistan, Thursday, May 9, 2013. Pakistan is scheduled to hold parliamentary elections on May 11, the first transition between democratically elected governments in a country that has experienced three military coups and constant political instability since its creation in 1947. The parliament's ability to complete its five-year term has been hailed as a significant achievement. Headband reads, "Pakistan Tehreek-e-Insaf".

Muhammed Muheisen/AP

A Pakistani supporter of former cricket star-turned-politician, and leader of the Pakistan Tehreek-e-Insaf party, Imran Khan, takes part during a rally in support of Mr Khan in Islamabad, Pakistan, on Thursday. Pakistan is scheduled to hold parliamentary elections on May 11, the first transition between democratically elected governments in a country that has experienced three military coups and constant political instability since its creation in 1947.

Supporters of Pakistani politician and former cricketer Imran Khan flash victory signs as they take part in an election campaign rally in Islamabad on May 8, 2013. Doctors said they expect Pakistani politician Imran Khan to make a full recovery despite fracturing his spine in a fall at a campaign rally just days before the general election. The retired cricket star and head of the Pakistan Movement for Justice (PTI) suffered several fractured vertebrae and a broken rib on Tuesday night when he fell from a lift raising him onto a platform at a campaign rally.

Aamir Qureshi/AFP

Supporters of Pakistani politician and former cricketer Imran Khan flash victory signs as they take part in an election campaign rally in Islamabad on Wednesday. Doctors said they expect Mr Khan to make a full recovery despite fracturing his spine in a fall at a campaign rally just days before the general election. The retired cricket star and head of the Pakistan Movement for Justice (PTI) suffered several fractured vertebrae and a broken rib on Tuesday night when he fell from a lift raising him onto a platform at a campaign rally.

Pakistani health worker Salma Saleem, right, marks the finger of a child after giving him a polio vaccine

Muhammed Muheisen/AP Photo

Pakistani health worker Salma Saleem, right, marks the finger of a child after giving him a polio vaccine in a neighborhood in Islamabad, Pakistan on April 15 2013. In December, gunmen killed nine polio workers in different parts of Pakistan. Several more workers have been killed since then, as well as policemen who were protecting them. The UN said last month that some 240,000 children missed vaccinations since July in parts of Pakistan’s tribal region, the main sanctuary for Islamic militants, because of security concerns.