A Pakistani girl carries clean water to her home in Lahore's slums in Pakistan, Wednesday, April 22, 2015. There is a scarcity of fresh drinking water in Pakistan among a population of around 180 million. (Photo by K. M. Chaudary/AP Photo)

A Pakistani man combs a sheep to attract customers on a roadside in Islamabad, Pakistan, Wednesday, April 15, 2015. (Photo by B. K. Bangash/AP Photo)

A laborer cuts woods to be used as fuel source at a shop on the eve of the International Labor Day in Peshawar, Pakistan April 30, 2015. (Photo by Bilawal Arbab/EPA)

Pakistani men take a plunge into a stream as they bathe there to beat the heat at an outskirts of Islamabad, Pakistan, Wednesday, April 8, 2015. (Photo by B. K. Bangash/AP Photo)

Internally displaced Pakistani children from tribal areas attend their daily lesson at a madrassa, a school for the study of Islam, on the outskirts of Islamabad, Pakistan, Monday, April 6, 2015. (Photo by B. K. Bangash/AP Photo)

A Pakistani boy who is displaced with his family from a tribal area of Bajur, where security forces are fighting against militants, plays with his donkey in Islamabad's slums, Monday, April 27, 2015 in Pakistan. (Photo by B. K. Bangash/AP Photo)

A Pakistani woman washes vegetables with a polluted water at a canal in Lahore, Pakistan, Tuesday, April 21, 2015. (Photo by K. M. Chaudary/AP Photo)

A laborer sleeps on sacks of charcoal in his workplace in Charsadda near Peshawar April 8, 2015. (Photo by Fayaz Aziz/Reuters)

A boy washes his cattle in the Sardaryab River in Charsadda near Peshawar April 8, 2015. (Photo by Fayaz Aziz/Reuters)

A boy gets his hair cut in a barber shop in Charsadda near Peshawar April 8, 2015. (Photo by Fayaz Aziz/Reuters)

Men bathe their horse in the Sardaryab River in Charsadda near Peshawar April 8, 2015. (Photo by Fayaz Aziz/Reuters)

A carpenter at a workshop pauses during a power outage in Karachi April 9, 2015. (Photo by Akhtar Soomro/Reuters)

A man prepares fish under lights powered by a generator at his stall in Islamabad April 9, 2015. After ordering summer dress code and switching off air-conditioners in offices, the Pakistani government has reintroduced a plan to beat the energy crisis in Islamabad – shops and restaurants must close earlier. (Photo by Caren Firouz/Reuters)

A man prepares fish under lights powered by a generator at his stall in Islamabad April 9, 2015. (Photo by Caren Firouz/Reuters)

Tailors work under lights powered by a generator in a shop in Islamabad April 9, 2015. (Photo by Caren Firouz/Reuters)

Zar Aslam, president of Pakistan's non-profit Environment Protection Fund, poses beside a Pink Rickshaw in Lahore April 8, 2015. Aslam, a Pakistani environmentalist, fed up with being groped and harassed by male auto-rickshaw drivers, has launched her own service exclusively for women passengers and drivers in her home city of Lahore – with just the one rickshaw on the road so far. (Photo by Mohsin Raza/Reuters)

Zar Aslam, president of Pakistan's non-profit Environment Protection Fund, drives a Pink Rickshaw in Lahore April 8, 2015. (Photo by Mohsin Raza/Reuters)

Haji Wazir, 60, puts the final touches on a clay pot for plants while his granddaughter Saima, 10, stands in the corner at a workshop in Peshawar April 13, 2015. (Photo by Fayaz Aziz/Reuters)

A member of the ceremonial guard adjusts his headgear during the finals of the Murree Brewery Cup polo tournament in Rawalpindi April 12, 2015. (Photo by Caren Firouz/Reuters)

A military band plays the bagpipes during the finals of the Murree Brewery Cup polo tournament in Rawalpindi April 12, 2015. (Photo by Caren Firouz/Reuters)

Fishermen from India stand behind bars in a lockup, after being detained in Pakistani waters, at a police station in Karachi April 18, 2015. According to local media, Pakistan maritime authorities arrested 47 Indian fishermen and took into custody their eight boats for illegal fishing in the country's territorial waters, police said on Saturday. (Photo by Akhtar Soomro/Reuters)

A folk artist from Sindh province sings at a roadside cafe in Islamabad April 21, 2015. (Photo by Sara Farid/Reuters)

A balloon seller unties a balloon outside a zoo in Islamabad April 21, 2015. (Photo by Sara Farid/Reuters)

Laborers prepare watermelons to be displayed for customers at a wholesale fruit and vegetable market on the outskirts of Karachi April 22, 2015. (Photo by Athar Hussain/Reuters)

A boy sorts scallions at a wholesale fruit and vegetable market on the outskirts of Karachi April 22, 2015. (Photo by Athar Hussain/Reuters)

A laborer sorts bananas at a wholesale fruit and vegetable market on the outskirts of Karachi April 22, 2015. (Photo by Athar Hussain/Reuters)

Children study between their classes at a local park in Islamabad April 22, 2015. Master Mohammad Ayoub, a Pakistani civil servant, started his program to educate underprivileged children in 1985. He helps secondary students who attend local schools with their studies and they in turn teach the children of workers with low paid jobs, the local slums and a local village. Ayoub supplies the educational supplies with his income as a civil servant while volunteers and his students teach the children English, Urdu and math classes. Their classroom is in a local park during fair weather and a room in the local slum during the rainy season. (Photo by Caren Firouz/Reuters)

Children attend class at a local park in Islamabad April 22, 2015. (Photo by Caren Firouz/Reuters)

A student listens to her teacher during class at a local park in Islamabad April 22, 2015. (Photo by Caren Firouz/Reuters)

Children study between their classes at a local park in Islamabad April 22, 2015. (Photo by Caren Firouz/Reuters)

People say their prayers under the leadership of Saudi Arabian Imam of the Grand Mosque Sheikh Khalid al Ghamdi during evening prayers at the Badshahi mosque in Lahore, Pakistan, April 25, 2015. (Photo by Mohsin Raza/Reuters)

A Pakistan paramilitary personnel assists a voter during municipal by-elections in Karachi, Pakistan April 23, 2015. The chief of Pakistan's main spy agency is spearheading a campaign to wrest control of the teeming port city of Karachi from a powerful political party, the military's latest, and some say boldest, foray into civilian life in recent years. (Photo by Akhtar Soomro/Reuters)

A child watches as people receive free food at the shrine of Bari Imam on the outskirts of Islamabad, Pakistan, April 27, 2015. (Photo by Caren Firouz/Reuters)

A man sits next to gas metres installed on a street corner at a residential compound in Karachi, Pakistan, April 29, 2015. Pakistan plans to install new gas import terminals and pipelines to underpin an economic revival linked to $46 billion in Chinese deals, but its ambitions are being undermined by poor planning, price uncertainty and security concerns, industry experts said. (Photo by Akhtar Soomro/Reuters)

A man sells Liquified Petroleum Gas (LPG) in Islamabad, Pakistan April 29, 2015. (Photo by Faisal Mahmood/Reuters)

A worker carries a cylinder of Liquified Petroleum Gas (LPG) at a gas distribution centre in Peshawar, Pakistan April 29, 2015. (Photo by Fayaz Aziz/Reuters)

A worker takes a break from his work at a steel smelting plant in Lahore, Pakistan, April 30, 2015. (Photo by Mohsin Raza/Reuters)

Vehicles move past a man resting on a taxi, as he waits for passengers, along a road in Karachi, Pakistan, May 5, 2015. (Photo by Akhtar Soomro/Reuters)

Boys sit in a tree under a partly cloudy sky in an open field in Karachi, Pakistan, May 6, 2015. (Photo by Akhtar Soomro/Reuters)

A girl looks at a book while sitting at the entrance of her school in Lahore, Pakistan, May 15, 2015. (Photo by Mohsin Raza/Reuters)

A man carries a newly purchased bed in Lahore, Pakistan, May 15, 2015. (Photo by Mohsin Raza/Reuters)

A shopkeeper arranges dry fruit bags at his shop in Peshawar, Pakistan May 18, 2015. (Photo by Fayaz Aziz/Reuters)

A man sits with his belongings while waiting for a train to leave for his hometown, at Cantonment Railways Station in Karachi, Pakistan, May 25, 2015. (Photo by Akhtar Soomro/Reuters)

A boy carries a hand fans on his head while selling them along Cantonment Railways Station in Karachi, Pakistan, May 25, 2015. (Photo by Akhtar Soomro/Reuters)

A man with a henna-dyed beard stands with others while waiting for a train to leave at Cantonment Railways Station in Karachi, Pakistan, May 25, 2015. (Photo by Akhtar Soomro/Reuters)

A man bathes in a stream to cool off during hot day in Islamabad, Pakistan, May 25, 2015. (Photo by Faisal Mahmood/Reuters)

Internally displaced Pakistani children from tribal areas attend their daily lesson at a madrassa, a school for the study of Islam, on the outskirts of Islamabad, Pakistan, Monday, April 6, 2015. (Photo by B. K. Bangash/AP Photo)

Pakistani loaders help a laborer to carry a sack of potatoes at a fruit and vegetable market in Lahore, Pakistan, Thursday, April 30, 2015. (Photo by K. M. Chaudary/AP Photo)

Sikh pilgrims attend a religious festival in Hasan Abdal near Islamabad in Pakistan, Tuesday, April 14, 2015. Pilgrims arrived from neighboring India and other countries to attend the religious festival “Besakhi” at a shrine of Gurdwara Punja Sahib, the second most sacred place for Sikhs. (Photo by B. K. Bangash/AP Photo)

Cut and cleaned fish is hung up to dry on a beach near Karachi, Pakistan, 29 April 2015. The fish, mostly dried on beaches and sent directly to the market, is a highly sought after item in Pakistan and is exported to markets in Europe and South East. (Photo by Rehan Khan/EPA)

A Pakistani vendor arranges mosquito nets on display for sale at a roadside stall in Islamabad, Pakistan, Friday, May 1, 2015. (Photo by B. K. Bangash/AP Photo)

A man sits in a doorway during a power outage in Lahore, Pakistan Wednesday, May 20, 2015. Most parts of Pakistan have been hit by an electricity crisis, causing power outages that last between 6 to 12 hours per day. (Photo by K. M. Chaudary/AP Photo)

Members of Pakistan's civil society rally against the Saudi-led coalition targeting Shiite rebels in Yemen, in Karachi, Pakistan, Monday, April 6, 2015. The coalition targeting Shiite rebels in Yemen has asked Pakistan to contribute soldiers, Pakistan's defense minister said Monday, raising the possibility of a ground offensive in the country. (Photo by Shakil Adil/AP Photo)

Pakistani female farmers collect potatoes in a field in Lahore, Pakistan, Thursday, April 16, 2015 Pakistani women play a major role in agricultural production and livestock raising. (Photo by K. M. Chaudary/AP Photo)

Pakistani children play in a stream polluted by sewerage from nearby localities, in a suburb of Islamabad, Pakistan, Tuesday, April 21, 2015. (Photo by B. K. Bangash/AP Photo)

A Pakistani woman receives food distributed at the Barri Imam shrine in Islamabad, Pakistan, Thursday, April 23, 2015. People who visit shrines and pray that their wishes are fulfilled usually offer food to be distributed to the poor. Hundreds of poor families receive free food daily at the shrine. (Photo by B. K. Bangash/AP Photo)

Pakistani Lala Akbar takes a break while cutting logs, in Islamabad, Pakistan, Wednesday, April 15, 2015. Logs are in great demand used as fuel for cooking and heating homes. (Photo by B. K. Bangash/AP Photo)

A Pakistani police officer walks pasts billboards showing pictures of Chinese President Xi Jinping, center, with Pakistan's President Mamnoon Hussain, left, and Prime Minister Nawaz Sharif welcoming Xi Jingping to Islamabad, Pakistan, Sunday, April 19, 2015. (Photo by Anjum Naveed/AP Photo)

Sikh pilgrims attend a religious festival in Hasan Abdal near Islamabad in Pakistan, Tuesday, April 14, 2015. Pilgrims arrived from neighboring India and other countries to attend the religious festival “Besakhi” at a shrine of Gurdwara Punja Sahib, the second most sacred place for Sikhs. (Photo by B. K. Bangash/AP Photo)

A man sells fruits on the roadside in Shahpur, Pakistan, 04 April 2015. (Photo by Omer Saleem/EPA)