Pakistani children who were displaced with their families from Pakistan's tribal areas enjoy a ride on a hand-operated wheel for the price of 5 rupees, (5 U.S. cents) for 5 minutes, in a poor neighborhood on the outskirts of Islamabad, Pakistan, Tuesday, December 30, 2014. (Photo by Muhammed Muheisen/AP Photo)

Pakistanis receive free food during a rally marking the birthday of Islam's Prophet Muhammad in Rawalpindi, Pakistan, Sunday, January 4, 2015. Thousands of Pakistani Muslims celebrated by participating in religious ceremonies and distributing free meals among the poor. (Photo by Anjum Naveed/AP Photo)

An elderly Pakistani man, who was displaced with his family from Pakistan's tribal region of Mohmand Agency due to fighting between the Taliban and the army, sits on a bed in front of his mud house on the outskirts of Islamabad, Pakistan, Monday, December 30, 2014. (Photo by Muhammed Muheisen/AP Photo)

Pakistanis shop for cartoon-shaped balloons from a vendor standing on a street leading to a rally marking the birthday of Islam's Prophet Muhammad in Peshawar, Pakistan, Sunday, January 4, 2015. (Photo by Muhammad Sajjad/AP Photo)

A Pakistani cook prepares food for participants of a rally marking the birthday of Islam's Prophet Muhammad in Peshawar, Pakistan, Sunday, January 4, 2015. (Photo by Anjum Naveed/AP Photo)

An Afghan refugee who works as a porter at a wholesale fruit an vegetable market walks to his work on the outskirts of Islamabad, Pakistan, Monday, January 5, 2015. (Photo by Muhammed Muheisen/AP Photo)

A Pakistani couple enjoys the last sunset of the year at Karachi beach, Wednesday, December 31, 2014, in Pakistan. (Photo by Fareed Khan/AP Photo)

Girls study outside their house on the outskirts of Islamabad January 1, 2015. (Photo by Zohra Bensemra/Reuters)

A Pakistani vendor prepares peanuts for sale on a roadside in Peshawar, Pakistan, January 7, 2015. Most of the items are imported from Afghanistan. After a good rain season the sales of dry fruits flourish. Tourists from all over Pakistan come to Peshawar to purchase dry fruits along with other items because of price differences between different parts of the country. (Photo by Bilawal Arbab/EPA)

Pakistani police officers stand guard at an entry point of the parliament building in Islamabad, Pakistan, Monday, January 5, 2014. Pakistani lawmakers have opened debate in parliament on a constitutional amendment tabled by the government to form special military courts for trial of terrorists. (Photo by Anjum Naveed/AP Photo)

A man decorates a street during a celebration to mark Eid-e-Milad-ul-Nabi, the birthday anniversary of Prophet Mohammad in Lahore January 3, 2015. (Photo by Mohsin Raza/Reuters)

Policemen stand guard near the site of a suicide bomb attack in Rawalpindi January 10, 2015. At least six people were killed and 17 wounded by a suicide bomber outside a Shi'ite mosque in the Pakistani city of Rawalpindi on Friday, police said. (Photo by Faisal Mahmood/Reuters)

A man mourns over the casket of his relative who was killed in a suicide attack before his funeral in Rawalpindi January 10, 2015. (Photo by Faisal Mahmood/Reuters)

Relatives of a bus accident victim mourn his death outside a hospital in Karachi, Pakistan, Sunday, January 11, 2015. A bus was destroyed after colliding with an oil tanker on a highway about 50 kilometers (31 miles) outside of Karachi Sunday, killing more than 50 people. Such horrific traffic accidents are not uncommon in Pakistan due to reckless, untrained drivers and poor roads. (Photo by Fareed Khan/AP Photo)

A Pakistani child holds a balloon while he was carried by his grandfather during a rally marking the birthday of Islam's Prophet Muhammad in Rawalpindi, Pakistan, Sunday, January 4, 2015. (Photo by Anjum Naveed/AP Photo)

Pakistani gather around and inside the wreckage of a passenger bus that was destroyed after colliding with an oil tanker on a highway about 50 kilometers (31 miles) outside of Karachi, Pakistan, Sunday, January 11, 2015. More than 50 people were killed in the accident. (Photo by Fareed Khan/AP Photo)

A woman, whose family moved to Islamabad from Pakistan's Khyber-Pakhtunkhwa province to look for work, carries a pile of bread as she enters her house on the outskirts of Islamabad January 1, 2015. (Photo by Zohra Bensemra/Reuters)

An elderly internally displaced Pakistani man from tribal areas stands in front of his mud home, waiting other men to head to work on the outskirts of Islamabad, Pakistan, Wednesday, January 7, 2015. (Photo by Muhammed Muheisen/AP Photo)

An elderly Pakistani woman asks for rice during a donated food distribution on the occasion of Prophet Muhammad's birthday at a shrine in Islamabad, Pakistan, Sunday, January 4, 2015. Food donations usually increase on Prophet Muhammad's birthday, the 12th Rabi-ul-Awal month on the Islamic calendar, with traditional festivities and religious fervor. (Photo by Muhammed Muheisen/AP Photo)

A woman, right, walks by Afghan refugee boys playing in a slum that hosts Afghan refugees and internally displaced Pakistanis from tribal areas on the outskirts of Islamabad, Pakistan, Thursday, January 1, 2015. (Photo by Muhammed Muheisen/AP Photo)

Children run on a wooden bridge over a stream of rain water and sewage in a poor neighborhood that hosts Afghan refugees and internally displaced Pakistanis from tribal areas, on the outskirts of Islamabad, Pakistan, Sunday, December 28, 2014. (Photo by Muhammed Muheisen/AP Photo)

A boy inflates his balloon near a girl carrying her sibling at the entrance on the outskirts of Islamabad January 1, 2015. (Photo by Zohra Bensemra/Reuters)

A Pakistani child who was displaced with his family from tribal areas lies next to his grandfather sleeping on a piece of wood next to his second hand clothes displayed for sale on a roadside in the outskirts of Islamabad, Pakistan, Friday, January 2, 2015. (Photo by Muhammed Muheisen/AP Photo)

A man who suffers from back pain reacts while having a massage by an elderly Afghan refugee man on a roadside on the outskirts of Islamabad, Pakistan, Thursday, January 1, 2015. (Photo by Muhammed Muheisen/AP Photo)

Afghan refugee children play in a field near a slum where they live on the outskirts of Islamabad, Pakistan, Friday, January 2, 2015. (Photo by Muhammed Muheisen/AP Photo)

A Pakistani youth who works at a brick factory, runs after donkeys which are used to transport bricks from site to another, in Mandra near Rawalpindi, Pakistan, Wednesday, December 31, 2014. (Photo by Muhammed Muheisen/AP Photo)

Afghan refugee Mohammed Khan, covers his cows with sheets to protect them from the cold in a poor neighborhood on the outskirts of Islamabad, Pakistan, Sunday, December 28, 2014. (Photo by Muhammed Muheisen/AP Photo)

Pakistani Waheed Bhatti, 35, left, and Javed Khan, 26, work in a brick factory in Mandra near Rawalpindi, Pakistan, Wednesday, December 31, 2014. (Photo by Muhammed Muheisen/AP Photo)

Afghan refugee girls sit on the ground attend a class to learn how to read and write the alphabet at a makeshift school in the outskirts of Islamabad, Pakistan, Monday, December 29, 2014. (Photo by Muhammed Muheisen/AP Photo)

A Pakistani boy holds a plastic bag as he waits to receive rice during a donated food distribution at a shrine in Islamabad, Pakistan, Monday, December 29, 2014. (Photo by Muhammed Muheisen/AP Photo)

Donkeys transport bricks from site to another at a brick factory in Mandra near Rawalpindi, Pakistan, Wednesday, December 31, 2014. (Photo by Muhammed Muheisen/AP Photo)

Pakistani army soldiers check vehicles near the Army Public School which was targeted by Taliban militants last year, in Peshawar, Pakistan, Monday, January 12, 2015. Children and staff returned to the school in northwestern Pakistan where Taliban gunmen nearly a month ago killed 150 people – almost all of them students. (Photo by B.K. Bangash/AP Photo)

A Pakistan army soldier transport his children to a school near the Army Public School targeted by Taliban militants, in Peshawar, Pakistan, Monday, January 12, 2015. Pakistani children and their parents returned Monday to the school where Taliban gunmen killed 150 of their classmates and teachers. (Photo by B.K. Bangash/AP Photo)

Pakistani students look out from a vehicle on their way to school near the Army Public School which was targeted by Taliban militants last year, in Peshawar, Pakistan, Monday, January 12, 2015. (Photo by B.K. Bangash/AP Photo)