A sweeper cleans a street in heavy fog, in Lahore, Pakistan, Monday, December12, 2016. Various cities in eastern and central Pakistan continue to experience heavy fog, disrupting air and road transportation. (Photo by K.M. Chaudary/AP Photo)





In this Friday, December 16, 2016 photo, a Pakistani Mohammad Ramzan, left, talks with friends in his cave home locally called “Bhora”, in Hasan Abdal, some 60 kilometers (35 miles) north of the capital Islamabad, Pakistan. Ramzan's family lives in one the dozens cave homes, which are equipped with all modern amenities and cool even on the hottest summer day and warm in winter nights, built by their forefathers in surroundings of the town of Hasan Abdal. Dug out of hard clay and earth, these cave homes are man-made, not natural formations which served as one of the earliest dwellings. (Photo by Anjum Naveed/AP Photo)





Farmers wash carrots on a polluted stream during harvest season at a farm on the outskirts of Faisalabad, Pakistan December 30, 2016. (Photo by Fayyaz Hussain/Reuters)





Pakistani vendors sell garlands at a flower market in Peshawar, Pakistan, Friday, December 9, 2016. (Photo by Mohammad Sajjad/AP Photo)





Pakistani warm themselves around a fire on a foggy day in Lahore, Pakistan, Saturday, December 24, 2016. Various cities in eastern and central Pakistan continue to experience heavy fog, disrupting air and road transportation. (Photo by K.M. Chaudary/AP Photo)





A girl leads her camels as she sells fresh camel's milk on the GT road Peshawar, Pakistan December 5, 2016. (Photo by Fayaz Aziz/Reuters)





A policeman stands guard at a market in Mingora, in Swat Valley, Pakistan December 4, 2016. (Photo by Hazrat Ali Bacha/Reuters)





A boy gestures from the top of a vehicle as he takes part in a religious procession during celebration to mark Eid-e-Milad-ul-Nabi, the birthday anniversary of Prophet Mohammad, in Rawalpindi, Pakistan December 12, 2016. (Photo by Faisal Mahmood/Reuters)





Men distribute halwa among participants taking part in a procession to celebrate Eid-e-Milad-ul-Nabi, the birthday anniversary of Prophet Mohammad, in Rawalpindi, Pakistan December 12, 2016. (Photo by Faisal Mahmood/Reuters)





A man prepares signs with Islamic sayings during a celebration to mark Eid-e-Milad-ul-Nabi, the birthday anniversary of Prophet Mohammad, in Peshawar, Pakistan December 12, 2016. (Photo by Fayaz Aziz/Reuters)





Children pose for a family picture during a celebration to mark Eid-e-Milad-ul-Nabi, the birthday anniversary of Prophet Mohammad, in Peshawar, Pakistan December 12, 2016. (Photo by Fayaz Aziz/Reuters)





A man fills water bottles at a sanitary water distribution point in Islamabad, Pakistan, December 14, 2016. (Photo by Caren Firouz/Reuters)





School children in uniform perform, in commemoration of the victims of an attack on the Army Public School in 2014, during a demonstration in Karachi, Pakistan, December 16, 2016. (Photo by Akhtar Soomro/Reuters)





A farmer spreads fertilizer on a field outside Faisalabad, Pakistan December 16, 2016. (Photo by Fayyaz Hussain/Reuters)





A caretaker leads camels on a road outside Faisalabad, Pakistan December 18, 2016. (Photo by Fayaz Aziz/Reuters)





A photographer takes pictures as an SUV takes part in the Indus river water cross race in Swabi, outside Peshawar, Pakistan December 18, 2016. (Photo by Fayaz Aziz/Reuters)





People warm themselves by a fire inside a dismantled vehicle at a scrapyard on a cold day in Srinagar December 19, 2016. (Photo by Danish Ismail/Reuters)





Women and children dance to music as they take part in a peace rally ahead of Christmas celebrations in Karachi, Pakistan December 21, 2016. (Photo by Akhtar Soomro/Reuters)





A girl rides on a makeshift merry go round on Christmas Day in Islamabad, Pakistan, December 25, 2016. (Photo by Faisal Mahmood/Reuters)





A fisherman from India waves from a window of a train, after he was released with others from a prison, at Cantonment railway station in Karachi, Pakistan, December 25, 2016. (Photo by Akhtar Soomro/Reuters)





A woman is comfored by other, as she mourns the death of a relative, who died after consuming locally made toxic liquor, in Toba Tek Singh, Pakistan, December 27, 2016. (Photo by Fayyaz Hussain/Reuters)





A soldier guards polio vaccination team administering polio vaccination to children during a three-day countrywide vaccination campaign in Peshawar, Pakistan, 21 December 2016. Pakistan is one of the last two countries, along with Afghanistan, where polio is still endemic. Though new polio cases dropped to a nine-year low in 2016, attacks by Islamist militants against health workers and police guarding them remained a challenge for a UN-funded vaccination campaign. (Photo by Arshad Arbab/EPA)





In this Tuesday, December 20, 2016 photo, Mohammad Ramzan, right, reacts while talking to The Associated Press with his young bride Saima in Jampur, Pakistan. Saima was given as a bride to the older man by her father so he could marry the groom’s sister, a practice of exchanging girls that is entrenched in conservative regions of Pakistan. It even has its own name in Urdu: Watta Satta, “give and take”. A mix of interests – family obligations, desire for sons, a wish to hand off a girl to a husband – can lead to a young teen in an a marriage she never sought. (Photo by K.M. Chaudhry/AP Photo)





In this Wednesday, December 21, 2016 photo, Wazir Ahmed, right, who married his underage daughter to a 36 year-old man, sits with his wives in Jampur, Pakistan. The marriage was in exchange for a second wife who is the man's sister. He hopes she will give him a son. He says he feels no remorse because tradition and faith demands parents marry their daughters, who he calls burdens, soon after they reach puberty. (Photo by K.M. Chaudhry/AP Photo)





In this Tuesday, December 20, 2016 photo, Saima, who married an older man in her early teens, fixes her scarf during an interview in Jampur, Pakistan. (Photo by K.M. Chaudhry/AP Photo)





Pakistani revellers, some dressed in “Santa Claus” hats, take part in a camel rally in Karachi on December 21, 2016, ahead of the celebration of Christmas. (Photo by Asif Hassan/AFP Photo)





A man carries recyclable material on his donkey cart along a foggy road, in Lahore, Pakistan, Thursday, December 8, 2016. Various cities in eastern Pakistan continue to experience heavy fog, disrupting air and road transportation. (Photo by K.M. Chaudary/AP Photo)





A Pakistani carpenter works on a fishing boat at the harbor of Karachi, Pakistan, Monday, June 25, 2012. (Photo by Shakil Adil/AP Photo)





Motorcyclists drive through a street decorated with flowers on the eve of celebrations marking the birth of Islam's Prophet Muhammad, in Lahore, Pakistan, Monday, December 12, 2016. Pakistani Muslims celebrate the holiday Monday with religious processions, ceremonies and by distributing free meals to the poor. (Photo by K.M. Chaudary/AP Photo)