Pakistani security is seen on the tarmac in front of the Royal Air Force plane in Lahore, Pakistan, October 17, 2019. The Royal Air Force plane carrying the royal couple was forced to abort a landing in Islamabad twice on Thursday and return to Lahore after being caught in a severe thunderstorm. REUTERS/Peter Nicholls 

People look at a JF-17 Thunder fighter aircraft of the Pakistani Air Force on static display at the 53rd International Paris Air Show at Le Bourget Airport near Paris, France June 22, 2019. REUTERS/Pascal Rossignol 

Pakistani Prime Minister Imran Khan (C) applauses as he is observes the fly-past by Pakistan Air Force (PAF) JF-17 Thunder fighter jet during the Pakistan Day military parade in Islamabad, Pakistan March 23, 2019. REUTERS/Akhtar Soomro 

People hold national flags and an Indian Air Force flag as they salute to celebrate after Indian authorities said their jets conducted airstrikes on militant camps in Pakistani territory, in Ahmedabad, India, February 26, 2019. REUTERS/Amit Dave 

Pakistani Air Force pilots display their skills during the Pakistan Day military parade in Islamabad, Pakistan, March 23, 2016. REUTERS/Faisal Mahmood

Soldiers holds their caps as a helicopter flies past during an operation, after a militant attack at Bacha Khan University in Charsadda, Pakistan, January 20, 2016. REUTERS/Fayaz Aziz 

A military helicopter flies past a mosque during an operation after a militant attack at Bacha Khan University, in Charsadda, Pakistan, January 20, 2016. REUTERS/Khuram Parvez 

Members from Hindu Sena, a hardline group, burn an effigy of Pakistani Prime Minister Nawaz Sharif, to protest against a militant attack at the Pathankot air base, in New Delhi, India, January 2, 2016. Four gunmen and two guards were killed when unidentified militants attacked the Indian Air Force base near the Pakistan border on Saturday in an apparent challenge to attempts to revive a dialog between the nuclear-armed neighbors. REUTERS/Anindito Mukherjee 

An army soldier carries an injured boy from helicopter, after he was rescued with others from an earthquake stricken area of Chitral, at the aviation base in Peshawar, Pakistan October 27, 2015. The Taliban urged aid agencies on Tuesday to push ahead in delivering emergency relief supplies after a major earthquake hit remote mountainous regions of northern Afghanistan and Pakistan. Relief groups' efforts to assess the damage were hindered by an unstable security situation that has left much of the affected areas unsafe for international aid workers and government troops. But the Taliban, which have stepped up their Islamist insurgency against the Western-backed government in Kabul this year, indicated they would not stand in the way of aid efforts. REUTERS/Fayaz Aziz 

Army soldiers move an injured woman from a helicopter, after she was rescued from the earthquake stricken area of Chitral, at the aviation base in Peshawar, Pakistan October 27, 2015. The Taliban urged aid agencies on Tuesday to push ahead in delivering emergency relief supplies after a major earthquake hit remote mountainous regions of northern Afghanistan and Pakistan. With large mountainous areas of Afghanistan hit and icy weather closing in, the unstable security situation has posed a major challenge to international aid groups that have been repeatedly targeted by insurgents. But the Taliban, which have driven their Islamist campaign against the Western-backed government in Kabul across the country this year, indicated they would not stand in the way of aid efforts and ordered fighters to help victims. REUTERS/Fayaz Aziz 

Army soldiers load tents onto a helicopter, which will be distributed to earthquake stricken areas, in Peshawar, Pakistan October 27, 2015. The Taliban urged aid agencies on Tuesday to push ahead in delivering emergency supplies to victims of the massive earthquake that hit remote mountainous regions of northern Afghanistan and Pakistan. With harsh winter weather setting in across the rugged Hindu Kush mountains where the earthquake struck, the plight of thousands of people left homeless by the earthquake was becoming increasingly serious. However the relief effort is being complicated by unstable security caused by the Taliban insurgency, which has made large parts of the affected areas unsafe for international organisations and government troops. REUTERS/Fayaz Aziz 

Army soldiers load tents onto a helicopter, which will be distributed to earthquake stricken areas, in Peshawar, Pakistan October 27, 2015. The Taliban urged aid agencies on Tuesday to push ahead in delivering emergency supplies to victims of the massive earthquake that hit remote mountainous regions of northern Afghanistan and Pakistan, killing at least 300 people. With harsh winter weather setting in across the rugged Hindu Kush mountains where the earthquake struck, the plight of thousands of people left homeless by the earthquake was becoming increasingly serious. However the relief effort is being complicated by unstable security caused by the Taliban insurgency, which has made large parts of the affected areas unsafe for international organisations and government troops. REUTERS/Fayaz Aziz 

Aziz Khan (2ndL), 42, from Pakistan who claims he was an aeronautical engineer in the Pakistanis Air Force, speaks with friends in his "hotel- shop" in the "New Jungle" make-shift camp as unseasonably cool temperatures arrive in Calais, northern France, October 14, 2015. More than 3,500 people, migrants and refugees are camped in Calais, fleeing war and poverty in the Middle East, Africa and Asia and now living in the jungle. Most of them are hoping to make the crossing to England. Picture taken October 14, 2015. REUTERS/Philippe Wojazer 

Aziz Khan (L), 42, from Pakistan who claims he was an aeronautical engineer in the Pakistanis Air Force, speaks with friends in his "hotel- shop" in the "New Jungle" make-shift camp as unseasonably cool temperatures arrive in Calais, northern France, October 14, 2015. More than 3,500 people, migrants and refugees are camped in Calais, fleeing war and poverty in the Middle East, Africa and Asia and now living in the jungle. Most of them are hoping to make the crossing to England. Picture taken October 14, 2015. REUTERS/Philippe Wojazer 

Aziz Khan (C), 42, from Pakistan, who claims he was an aeronautical engineer in the Pakistanis Air Force, poses in front of his "hotel- shop" in the "New Jungle" make-shift camp as unseasonably cool temperatures arrive in Calais, northern France, October 14, 2015. More than 3,500 people, migrants and refugees are camped in Calais, fleeing war and poverty in the Middle East, Africa and Asia and now living in the jungle. Most of them are hoping to make the crossing to England. Picture taken October 14, 2015. REUTERS/Philippe Wojazer 

Aziz Khan (L), 42, from Pakistan, who claims he was an aeronautical engineer in the Pakistanis Air Force, speaks with friends in his "hotel- shop" in the "New Jungle" make-shift camp as unseasonably cool temperatures arrive in Calais, northern France, October 14, 2015. More than 3,500 people, migrants and refugees are camped in Calais, fleeing war and poverty in the Middle East, Africa and Asia and now living in the jungle. Most of them are hoping to make the crossing to England. Picture taken October 14, 2015. REUTERS/Philippe Wojazer 

Aziz Khan, 42, from Pakistan, who claims he was an aeronautical engineer in the Pakistanis Air Force, poses in front of his "hotel- shop" in the "New Jungle" make-shift camp as unseasonably cool temperatures arrive in Calais, northern France, October 14, 2015. More than 3,500 people, migrants and refugees are camped in Calais, fleeing war and poverty in the Middle East, Africa and Asia and now living in the jungle. Most of them are hoping to make the crossing to England. Picture taken October 14, 2015. REUTERS/Philippe Wojazer TPX IMAGES OF THE DAY 

Aziz Khan (R), 42, from Pakistan, who claims he was an aeronautical engineer in the Pakistanis Air Force, poses in front of his "hotel- shop" in the "New Jungle" make-shift camp as unseasonably cool temperatures arrive in Calais, northern France, October 14, 2015. More than 3,500 people, migrants and refugees are camped in Calais, fleeing war and poverty in the Middle East, Africa and Asia and now living in the jungle. Most of them are hoping to make the crossing to England. Picture taken October 14, 2015. REUTERS/Philippe Wojazer 

People light candles for the victims of an attack on a Pakistani air force base in Karachi, Pakistan, September 18, 2015. Taliban gunmen killed 29 people, including 16 praying in a mosque, when they stormed a Pakistani air force base on Friday, a military spokesman said, in the deadliest Taliban attack on a military installation in the country's history. REUTERS/Akhtar Soomro 

People hold placards during a candlelight vigil for the victims of an attack on a Pakistani air force base in Karachi, Pakistan, September 18, 2015. Taliban gunmen killed 29 people, including 16 praying in a mosque, when they stormed a Pakistani air force base on Friday, a military spokesman said, in the deadliest Taliban attack on a military installation in the country's history. REUTERS/Akhtar Soomro 

Soldiers help emergency workers wheel an injured man to a hospital after an attack on an air force base in Peshawar, Pakistan, September 18, 2015. Taliban gunmen stormed a Pakistani Air Force base early on Friday, killing at least 17 people, a military spokesman said, the deadliest attack on a military installation this year. REUTERS/Khuram Parvez 

Emergency workers wheel an injured man to a hospital after an attack on an air force base in Peshawar, Pakistan, September 18, 2015. Taliban gunmen stormed a Pakistani Air Force base early on Friday, killing at least 17 people, a military spokesman said, the deadliest attack on a military installation this year. REUTERS/Khuram Parvez TPX IMAGES OF THE DAY

Soldiers arrive to repel an attack on an air force base in Peshawar, Pakistan, September 18, 2015. Taliban gunmen stormed a Pakistani Air Force base in the volatile northwestern city of Peshawar early on Friday, a military spokesman said, the first major attack on a military installation in several weeks. REUTERS/Fayaz Aziz 

Emergency workers wheel an injured man to a hospital after an attack on an air force base in Peshawar, Pakistan, September 18, 2015. Gunmen attacked a Pakistani Air Force base in the northwestern city of Peshawar early on Friday, a military spokesman said, the first major attack in several weeks. REUTERS/Khuram Parvez TPX IMAGES OF THE DAY

Members of Pakistan Navy's SSG perform during a ceremony to mark Pakistan's Defence Day, or Memorial Day, in Karachi, Pakistan, September 6, 2015. Pakistanis on Sunday marked the golden jubilee of Defence Day in memory of those who died in the 1965 Indo-Pakistani War. REUTERS/Akhtar Soomro 

Women take a selfie while visiting an exhibition organised by the Pakistan Air Force (PAF) in Peshawar, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. REUTERS/Khuram Parvez 

Pakistani Air Force pilots perform during a ceremony marking Pakistan Defence Day in Islamabad, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. REUTERS/Faisal Mahmood

Spectators watch a performance by Pakistani jets during a ceremony marking Pakistan Defence Day in Islamabad, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. REUTERS/Faisal Mahmood

A Pakistani F-16 fighter performs during a ceremony marking Pakistan Defence Day in Islamabad, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. REUTERS/Faisal Mahmood

Pakistan's JF-17 Thunder fighter jet performs during a ceremony marking Pakistan Defence Day in Islamabad, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. REUTERS/Faisal Mahmood

A Pakistani F-16 fighter performs during a ceremony marking Pakistan Defence Day in Islamabad, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. REUTERS/Faisal Mahmood

Air Vice Marshal Aasim Zaheer (3rd R), Air Officer Commanding, Pakistan Air Force, walks with officers to lay a wreath at the mausoleum of Muhammad Ali Jinnah during Defence Day ceremonies, or Pakistan's Memorial Day, in Karachi, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. Jinnah is generally regarded as the founder of Pakistan. REUTERS/Akhtar Soomro 

Members of Pakistan's air force march past the mausoleum of Muhammad Ali Jinnah during Defence Day ceremonies, or Pakistan's Memorial Day, in Karachi, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. Jinnah is generally regarded as the founder of Pakistan. REUTERS/Akhtar Soomro 

Members of Pakistan's air force march past the mausoleum of Muhammad Ali Jinnah during Defence Day ceremonies, or Pakistan's Memorial Day, in Karachi, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. Jinnah is generally regarded as the founder of Pakistan. REUTERS/Akhtar Soomro 

Members of Pakistan's air force march past the mausoleum of Muhammad Ali Jinnah during Defence Day ceremonies, or Pakistan's Memorial Day, in Karachi, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. Jinnah is generally regarded as the founder of Pakistan. REUTERS/Akhtar Soomro 

Members of Pakistan's air force salute as they raise the national flag at the mausoleum of Muhammad Ali Jinnah during Defence Day ceremonies, or Pakistan's Memorial Day, in Karachi, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. Jinnah is generally regarded as the founder of Pakistan. REUTERS/Akhtar Soomro 

Members of Pakistan's air force march past the mausoleum of Muhammad Ali Jinnah during Defence Day ceremonies, or Pakistan's Memorial Day, in Karachi, Pakistan, September 6, 2015. Pakistanis are celebrating the golden jubilee of Pakistan Defence Day in memory of the martyrs of the 1965 war who defended the motherland against the powerful Indian Army in the Indo-Pak war. Jinnah is generally regarded as the founder of Pakistan. REUTERS/Akhtar Soomro 

Pakistani soldiers show their skills during a rehearsal for the Defense Day ceremony, or Memorial Day in Islamabad September 4, 2015. Pakistan will celebrate its Defense Day on September 6. REUTERS/Faisal Mahmood 

Pakistani Air Force pilots display their skills during rehearsal for the Defence Day ceremony, or Pakistan's Memorial Day in Islamabad, Pakistan, September 4, 2015. Pakistan will celebrate its Defence Day on September 6. REUTERS/Faisal Mahmood

Pakistani Air Force pilots display their skills during rehearsal for the Defence Day ceremony, or Pakistan's Memorial Day in Islamabad, Pakistan, September 4, 2015. Pakistan will celebrate its Defence Day on September 6. REUTERS/Faisal Mahmood

A woman reacts as she stands near a relative's grave, at the Memorial Center in Potocari near Srebrenica, Bosnia and Herzegovina July 10, 2015. The bodies of the 136 recently identified victims of Srebrenica massacre will be buried on July 11, the anniversary of the massacre when Bosnian Serb forces slaughtered 8,000 Muslim men and boys and buried them in mass graves in Europe's worst massacre since World War Two. REUTERS/Stoyan Nenov

EDITORIAL USE ONLY - NO COMMERCIAL OR BOOK SALES. Pakistani immigrants row their engineless dingy, which was drifting out of control, in rough seas between Greece and Turkey early May 30, 2015. Ahmad, one of the immigrants onboard the dingy, said that they have been rowing for over five hours before eventualy reaching a beach in central Kos town. According to local media, an average of over 200 immigrants have been arriving in Kos every day in the last two months. REUTERS/Yannis Behrakis TPX IMAGES OF THE DAY 

Soldiers carry a flag draped coffin of the late Philippine ambassador Domingo Lucenario, who was among killed in a helicopter crash in Pakistan, after it was unloaded from a Pakistani Air Force C-130 plane, at Villamor Air Base in Pasay City, Metro Manila in the Philippines May 13, 2015. The ambassadors of Norway and the Philippines and the wives of the Malaysian and Indonesian envoys were killed when the helicopter they were on crashed in the Gilgit region in Pakistan. REUTERS/Erik De Castro 

Pakistani army soldiers assist a diplomat who was injured in a helicopter crash in Gilgit, after he arrived with others at Nur Khan air base in Islamabad May 9, 2015. Pakistan's military brought the bodies of two ambassadors and two ambassadors' wives to Islamabad on Saturday, a day after they were killed in a helicopter crash in northern mountains as they where inspecting a tourism project. The ambassadors of Norway and the Philippines and the wives of the Malaysian and Indonesian envoys were killed when the helicopter they were on crashed in the Gilgit region. Three Pakistani crewmen were also killed and several diplomats were injured when the Mi-17 helicopter came down on a school in a valley lined by pine forests and overlooked by snow-peaked mountains. REUTERS/Faisal Mahmood
TPX IMAGES OF THE DAY

A relative carries a picture of a student killed in Thursday's attack by gunmen, at the Chiromo Mortuary in Kenya's capital Nairobi April 6, 2015. The Kenyan air force has destroyed two al Shabaab camps in Somalia, it said on Monday, in the first major military response since the Islamist group massacred students at a Kenyan university last week. REUTERS/Thomas Mukoya

Women, some holding garlands of flowers, react while waiting for their relatives arriving alongside other Pakistanis evacuated from Yemen, at Jinnah International Airport in Karachi March 30, 2015. Pakistan evacuated about 500 of its nationals by plane from Yemen on Sunday during a brief pause in air strikes by a Saudi-led military coalition against Shi'ite Muslim Houthi forces, a Saudi military spokesman said. REUTERS/Akhtar Soomro

A Pakistani man (C) receives bouquet of flowers as he greets relatives after arriving with other Pakistanis evacuated from Yemen at Jinnah International Airport in Karachi March 30, 2015. Pakistan evacuated about 500 of its nationals by plane fromYemen on Sunday during a brief pause in air strikes by a Saudi-led military coalition against Shi'ite Muslim Houthi forces, a Saudi military spokesman said. REUTERS/Akhtar Soomro

A Pakistani man (C), who was stranded in Yemen, holds a national flag and a bouquet of flowers as he pushes his luggage after arriving with other Pakistanis evacuated from Yemen at Jinnah International Airport in Karachi March 30, 2015. Pakistan evacuated about 500 of its nationals by plane from Yemen on Sunday during a brief pause in air strikes by a Saudi-led military coalition against Shi'ite Muslim Houthi forces, a Saudi military spokesman said. REUTERS/Akhtar Soomro

A Pakistani man (R), who was stranded in Yemen, greets relatives after arriving with other Pakistanis evacuated from Yemen at Jinnah International Airport in Karachi March 30, 2015. Pakistan evacuated about 500 of its nationals by plane fromYemen on Sunday during a brief pause in air strikes by a Saudi-led military coalition against Shi'ite Muslim Houthi forces, a Saudi military spokesman said. REUTERS/Akhtar Soomro

Pakistani woman with a bouquet, who was stranded in Yemen, greets her relatives upon her arrival with others, at Jinnah International Airport in Karachi early March 30, 2015. Pakistan evacuated about 500 of its nationals by plane from Yemen on Sunday during a brief pause in air strikes by a Saudi-led military coalition against Shi'ite Muslim Houthi forces, a Saudi military spokesman said. REUTERS/Akhtar Soomro

Pakistani Air Force pilots display their skills during the Pakistan Day parade in Islamabad March 23, 2015. Pakistan held its first Republic Day parade in seven years on Monday, full of flag-waving pomp and aerial military expertise, a symbolic show of strength in the war against the Taliban months after a militant attack on a school killed 132 children. Pakistan Day commemorates March 23, 1940, when the Muslim League demanded the establishment of separate nations to protect Muslims in the then British colony of India. REUTERS/Faisal Mahmood

An army helicopter flies overhead during an anti-government rally in Islamabad November 30, 2014. Protesters, led by Imran Khan, chairman of the opposition Pakistan Tehreek-e-Insaf (PTI) political party, have been locked in a bitter stand-off with the government since mid-August. REUTERS/Faisal Mahmood (PAKISTAN - Tags: POLITICS CIVIL UNREST TRANSPORT MILITARY) 

An aerial view taken from a Pakistani Air Force helicopter shows a flooded area in in Shujabad Punjab province September 15, 2014. About 150,000 people were still stranded in their homes a week after Indian Kashmir's worst flood in over a century and fears grew on Sunday of an outbreak of diseases from vast fields of stagnant brown water. REUTERS/Asim Tanveer (PAKISTAN - Tags: DISASTER ENVIRONMENT) 

Flood victims stand and look as a Pakistani Air Force helicopter flies over a flooded area in Multan, Punjab province September 12, 2014. Floods that have killed 450 people in India and Pakistan began to recede on Wednesday giving rescue teams a chance to evacuate thousands of villagers stranded by the heaviest rainfall in 50 years in the heavily militarised and disputed region of Kashmir. REUTERS/Zohra Bensemra (PAKISTAN - Tags: DISASTER ENVIRONMENT SOCIETY MILITARY TPX IMAGES OF THE DAY) 

An aerial view taken from an Pakistani air force helicopter shows a flooded area in Multan, Punjab province, September 12, 2014. Floods that have killed 450 people in India and Pakistan began to recede on Wednesday giving rescue teams a chance to evacuate thousands of villagers stranded by the heaviest rainfall in 50 years in the heavily militarised and disputed region of Kashmir. REUTERS/Zohra Bensemra ( PAKISTAN - Tags: DISASTER ENVIRONMENT) 

An aerial view taken from an Pakistani air force helicopter shows a flooded area in Multan, Punjab province, September 12, 2014. Floods that have killed 450 people in India and Pakistan began to recede on Wednesday giving rescue teams a chance to evacuate thousands of villagers stranded by the heaviest rainfall in 50 years in the heavily militarised and disputed region of Kashmir. REUTERS/Zohra Bensemra (PAKISTAN - Tags: DISASTER ENVIRONMENT) 

An aerial view taken from an Pakistani air force helicopter shows a flooded area in Multan, Punjab province, September 12, 2014. Floods that have killed 450 people in India and Pakistan began to recede on Wednesday giving rescue teams a chance to evacuate thousands of villagers stranded by the heaviest rainfall in 50 years in the heavily militarised and disputed region of Kashmir. REUTERS/Zohra Bensemra (PAKISTAN - Tags: DISASTER ENVIRONMENT) 

People, who were evacuated from flood-affected areas of Srinagar city, walk past an Indian Air Force AN-32 aircraft at an airport in Jammu September 9, 2014. The heaviest rains to fall on Kashmir in 50 years caught Indian and Pakistani authorities off guard, with criticism of their disaster preparedness growing on Tuesday as the number of dead hit 420 and thousands remained trapped on rooftops. On the Indian side of the heavily militarised de facto border that divides the Himalayan region, more than 2,000 villages and the city of Srinagar were submerged. REUTERS/Mukesh Gupta (INDIAN-ADMINISTERED KASHMIR - Tags: DISASTER MILITARY ENVIRONMENT TRANSPORT) 

Anti-government protesters check a car as they guard a checkpoint at the entrance of an area under their control near the prime minister's house during the Revolution March in Islamabad September 2, 2014. Pakistani protesters pushed closer to the prime minister's house in central Islamabad on Monday in their bid to force his removal and forced national television off the air after clashes turned violent over the weekend. REUTERS/Zohra Bensemra (PAKISTAN - Tags: POLITICS CIVIL UNREST)