Hamas leader Khaled Meshaal arrives to announce a new policy document in Doha, Qatar, May 1, 2017. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal gestures as he announces a new policy document in Doha, Qatar, May 1, 2017. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal gestures as he announces a new policy document in Doha, Qatar, May 1, 2017. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal gestures as he announces a new policy document in Doha, Qatar, May 1, 2017. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal gestures as he announces a new policy document in Doha, Qatar, May 1, 2017. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal (L) reacts during his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Hamas leader Khaled Meshaal (C) attends his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Hamas leader Khaled Meshaal (L) speaks to mourners during his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Hamas leader Khaled Meshaal (C) prays during his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Hamas leader Khaled Meshaal (C) speaks to mourners during his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Private security of Hamas leader Khaled Meshaal (2nd R), stand guard around him during his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Hamas leader Khaled Meshaal (C) carries the body of his mother during her funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Hamas leader Khaled Meshaal (front 3rd R) prays during his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Hamas leader Khaled Meshaal (front 3rd R) prays during his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed TPX IMAGES OF THE DAY

Private security of Hamas leader Khaled Meshaal (C), stand guard around him during his mother's funeral in Amman, Jordan, September 4, 2016. REUTERS/Muhammad Hamed

Hama chief Khaled Meshaal (R) speaks to South African President Jacob Zuma ahead of a media briefing at the headquarters of South Africa's ruling African National Congress (ANC) in Johannesburg, October 19, 2015. Meshaal and a delegation from Palestine are in South Africa at the invitation of the ANC. REUTERS/Siphiwe Sibeko

Hama chief Khaled Meshaal addresses a media briefing at the headquarters of South Africa's ruling African National Congress (ANC) in Johannesburg, October 19, 2015. Meshaal and a delegation from Palestine are in South Africa at the invitation of the ANC. REUTERS/Siphiwe Sibeko

Hama chief Khaled Meshaal (C) addresses a media briefing at the headquarters of South Africa's ruling African National Congress (ANC) in Johannesburg, October 19, 2015. Meshaal and a delegation from Palestine are in South Africa at the invitation of the ANC. REUTERS/Siphiwe Sibeko

Hamas leader Khaled Meshaal speaks during a news conference in Doha, Qatar September 7, 2015. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal speaks during a news conference in Doha, Qatar September 7, 2015. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal speaks during a news conference in Doha, Qatar September 7, 2015. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal speaks at a news conference in Doha, Qatar September 7, 2015. REUTERS/Naseem Zeitoon

Hamas leader Khaled Meshaal speaks during an interview with Reuters in Doha October 16, 2014. Meshaal on Thursday called on Muslims to defend the al-Aqsa mosque compound in Jerusalem, saying Israel was trying to seize the site, revered in Islam and Judaism and focus of a Palestinian uprising in 2000. REUTERS/Fadi Al-Assaad (QATAR - Tags: POLITICS RELIGION)

Hamas leader Khaled Meshaal speaks during an interview with Reuters in Doha October 16, 2014. Meshaal on Thursday called on Muslims to defend the al-Aqsa mosque compound in Jerusalem, saying Israel was trying to seize the site, revered in Islam and Judaism and focus of a Palestinian uprising in 2000. REUTERS/Fadi Al-Assaad (QATAR - Tags: POLITICS RELIGION)

Hamas leader Khaled Meshaal is pictured during an interview with Reuters in Doha October 16, 2014. Meshaal on Thursday called on Muslims to defend the al-Aqsa mosque compound in Jerusalem, saying Israel was trying to seize the site, revered in Islam and Judaism and focus of a Palestinian uprising in 2000. REUTERS/Fadi Al-Assaad (QATAR - Tags: POLITICS RELIGION)

Hamas leader Khaled Meshaal speaks during an interview with Reuters in Doha October 16, 2014. Meshaal on Thursday called on Muslims to defend the al-Aqsa mosque compound in Jerusalem, saying Israel was trying to seize the site, revered in Islam and Judaism and focus of a Palestinian uprising in 2000. REUTERS/Fadi Al-Assaad (QATAR - Tags: POLITICS RELIGION)

Hamas leader Khaled Meshaal speaks during an interview with Reuters in Doha October 16, 2014. Meshaal on Thursday called on Muslims to defend the al-Aqsa mosque compound in Jerusalem, saying Israel was trying to seize the site, revered in Islam and Judaism and focus of a Palestinian uprising in 2000. REUTERS/Fadi Al-Assaad (QATAR - Tags: POLITICS RELIGION)

Jordan's King Abdullah (R) meets with Hamas leader Khaled Meshaal at the Royal Palace in Amman January 28, 2013. REUTERS/Majed Jaber (JORDAN - Tags: POLITICS ROYALS)

Jordan's King Abdullah (2nd R) and Prince Ali Bin Al-Hussein (R) meet with Hamas leader Khaled Meshaal (2nd L) and Mohammad Nazzal (L), a member of the Hamas leadership, at the Royal Palace in Amman January 28, 2013. REUTERS/Majed Jaber (JORDAN - Tags: POLITICS)

Jordan's King Abdullah (R) meets with Hamas leader Khaled Meshaal (C) and Mohammad Nazzal (L), a member of the Hamas leadership, at the Royal Palace in Amman January 28, 2013. REUTERS/Majed Jaber (JORDAN - Tags: POLITICS ROYALS)

Jordan's King Abdullah (R) meets with Hamas leader Khaled Meshaal at the Royal Palace in Amman January 28, 2013. REUTERS/Majed Jaber (JORDAN - Tags: POLITICS ROYALS)

Hamas leader Khaled Meshaal (R) and Mohammad Nazzal, a member of the Hamas leadership, speak to media after their meeting with Jordan's King Abdullah at the Royal Palace in Amman January 28, 2013. REUTERS/Majed Jaber (JORDAN - Tags: POLITICS)

Hamas chief Khaled Meshaal (L) waves to people as he sits in a jeep beside senior Hamas leader Ismail Haniyeh in Rafah before leaving Gaza Strip December 10, 2012. Hamas leader Meshaal ended his first visit to the Gaza Strip on Monday with a pledge his Islamist movement would strive to heal political rifts with Palestinian rivals who hold sway in the occupied West Bank. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS)

Senior Hamas leader Ismail Haniyeh (R) gives Hamas chief Khaled Meshaal gives a diplomatic Palestinian Authority Passport before Meshaal leaves Gaza Strip December 10, 2012. Hamas leader Meshaal ended his first visit to the Gaza Strip on Monday with a pledge his Islamist movement would strive to heal political rifts with Palestinian rivals who hold sway in the occupied West Bank. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS)

Hamas chief Khaled Meshaal (L) sits in a jeep beside senior Hamas leader Ismail Haniyeh in Rafah before leaving Gaza Strip December 10, 2012. Hamas leader Meshaal ended his first visit to the Gaza Strip on Monday with a pledge his Islamist movement would strive to heal political rifts with Palestinian rivals who hold sway in the occupied West Bank. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS)

Hamas chief Khaled Meshaal (L) hugs senior Hamas leader Ismail Haniyeh before leaving Gaza Strip December 10, 2012. Hamas leader Meshaal ended his first visit to the Gaza Strip on Monday with a pledge his Islamist movement would strive to heal political rifts with Palestinian rivals who hold sway in the occupied West Bank. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS)

Hamas chief Khaled Meshaal shakes hands with a man as he leaves the Rafah border crossing in the southern Gaza Strip December 10, 2012. Hamas leader Meshaal ended his first visit to the Gaza Strip on Monday with a pledge his Islamist movement would strive to heal political rifts with Palestinian rivals who hold sway in the occupied West Bank. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS)

Hamas chief Khaled Meshaal (L) waves to people as he sits in a jeep beside senior Hamas leader Ismail Haniyeh in Rafah before leaving Gaza Strip December 10, 2012. Hamas leader Meshaal ended his first visit to the Gaza Strip on Monday with a pledge his Islamist movement would strive to heal political rifts with Palestinian rivals who hold sway in the occupied West Bank. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS)

Hamas chief Khaled Meshaal (L) waves to people as he sits in a jeep beside senior Hamas leader Ismail Haniyeh in Rafah before leaving Gaza Strip December 10, 2012. Hamas leader Meshaal ended his first visit to the Gaza Strip on Monday with a pledge his Islamist movement would strive to heal political rifts with Palestinian rivals who hold sway in the occupied West Bank. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS)

Hamas chief Khaled Meshaal speaks with Kadejah, the sister of late Palestinian leader Yasser Arafat (pictured on the wall), in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST TPX IMAGES OF THE DAY)

Hamas chief Khaled Meshaal (R) speaks to the crowd as he rides in a car beside senior Hamas leader Ismail Haniyeh (L) in the northern Gaza Strip December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (R) speaks to the crowd as he rides in a car beside senior Hamas leader Ismail Haniyeh (L) in the northern Gaza Strip December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (R) waves to the crowd as he rides in a car beside senior Hamas leader Ismail Haniyeh (L) in the northern Gaza Strip December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (front R) waves to the crowd as he rides in a car beside senior Hamas leader Ismail Haniyeh (L) in the northern Gaza Strip December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Mohammed Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal kisses the head of Kadejah, the sister of late Palestinian leader Yasser Arafat, in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Khaled Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (in front) prays with senior leaders of Hamas and Fatah in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Khaled Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (in front) prays with senior leaders of Hamas and Fatah in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (L) shakes hands with Kadejah the sister of late Palestinian leader Yasser Arafat in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Khaled Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (L) receives a plaque, representing what they say is a victory over Israel, from senior Hamas leader Ismail Haniyeh (R) during a ceremony in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise.
REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS CIVIL UNREST)

Hamas chief Khaled Meshaal (L) speaks with the mother of Palestinian prisoner Hassan Salama, held in an Israeli jail, during a ceremony in Gaza City December 9, 2012. Hamas' vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Israeli Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (C) raises hands with Greek Orthodox Archbishop Alexios (L) and senior Muslim cleric Hassan Al-Jojo (R) during a ceremony in Gaza City December 9, 2012. Hamas' vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Israeli Prime Minister Benjamin Netanyahu said on Sunday. Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal waves to Palestinian student during his visit to the Islamic University in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Khaled Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Suhaib Salem (GAZA - Tags: POLITICS PROFILE ANNIVERSARY CIVIL UNREST TPX IMAGES OF THE DAY)

A Palestinian student kisses Hamas chief Khaled Meshaal during his visit to the Islamic University in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Khaled Meshaal, the leader of the Islamist Hamas movement, made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Suhaib Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (C) visits the Islamic University in Gaza City December 9, 2012. Hamas's vow to vanquish Israel after claiming "victory" in last month's Gaza conflict vindicates Israel's reluctance to relinquish more land to the Palestinians, Prime Minister Benjamin Netanyahu said on Sunday. Meshaal made a defiant speech before thousands of supporters in the Gaza Strip on Saturday, promising to take "inch-by-inch" all of modern-day Israel, which he said he would never recognise. REUTERS/Suhaib Salem (GAZA - Tags: POLITICS CIVIL UNREST TPX IMAGES OF THE DAY)

Hamas chief Khaled Meshaal (C) is surrounded by his bodyguards and Palestinian students during his visit to the Islamic University in Gaza City December 9, 2012. Meshaal, in a defiant speech during his first ever visit to Gaza, told a mass rally on Saturday he would never recognise Israel and pledged to "free the land of Palestine inch by inch". REUTERS/Suhaib Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Hamas chief Khaled Meshaal (C) is greeted during his visit to the Islamic University in Gaza City December 9, 2012. Meshaal, in a defiant speech during his first ever visit to Gaza, told a mass rally on Saturday he would never recognise Israel and pledged to "free the land of Palestine inch by inch". REUTERS/Suhaib Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Palestinian students hold the hand of Hamas chief Khaled Meshaal (2nd R) during his visit to the Islamic University in Gaza City December 9, 2012. Meshaal, in a defiant speech during his first ever visit to Gaza, told a mass rally on Saturday he would never recognise Israel and pledged to "free the land of Palestine inch by inch". REUTERS/Suhaib Salem (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)

Senior Hamas leaders Ismail Haniyeh (L) and Mahmoud Al-Zahar (R) pray at the stage during a rally marking the 25th anniversary of the founding of Hamas, in Gaza City December 8, 2012. Hamas leader Khaled Meshaal, in an uncompromising speech during his first ever visit to Gaza after decades of exile, told a mass rally on Saturday he would never recognise Israel and pledged to "free the land of Palestine inch by inch". REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST RELIGION)

Hamas chief Khaled Meshaal (C) and senior Hamas leader Ismail Haniyeh (front R) wave to the crowd from a car as they leave a rally marking the 25th anniversary of the founding of Hamas, in Gaza City December 8, 2012. Meshaal, in an uncompromising speech during his first ever visit to Gaza after decades of exile, told a mass rally on Saturday he would never recognise Israel and pledged to "free the land of Palestine inch by inch". REUTERS/Ahmed Jadallah (GAZA - Tags: POLITICS ANNIVERSARY CIVIL UNREST)