Afghanistan President Mohammad Ashraf Ghani Ahmadzai addresses the 72nd United Nations General Assembly at U.N. Headquarters in New York, U.S., September 19, 2017. REUTERS/Eduardo Munoz 

Afghanistan President Mohammad Ashraf Ghani Ahmadzai addresses the 72nd United Nations General Assembly at U.N. Headquarters in New York, U.S., September 19, 2017. REUTERS/Eduardo Munoz 

U.S. Defense Secretary Ashton Carter (L) speaks during a joint news conference with Afghanistan's President Ashraf Ghani in Kabul, Afghanistan December 9, 2016.REUTERS/Mohammad Ismail 

Afghanistan's President Ashraf Ghani speaks during a joint news conference with U.S. Defense Secretary Ashton Carter (L) in Kabul, Afghanistan December 9, 2016.REUTERS/Mohammad Ismail 

U.S Defense Secretary Ashton Carter (L) and Afghanistan's President Ashraf Ghani (R) leave after a news conference in Kabul, Afghanistan December 9, 2016.REUTERS/Mohammad Ismail 

U.S Defense Secretary Ashton Carter (L) shakes hands with Afghanistan's President Ashraf Ghani during a news conference in Kabul, Afghanistan December 9, 2016. REUTERS/Mohammad Ismail 

Afghanistan's President Ashraf Ghani speaks to Sharbat Gula, the green-eyed "Afghan Girl" whose 1985 photo in National Geographic became a symbol of her country's wars, after she arrived in Kabul, Afghanistan November 9, 2016. REUTERS/Mohammad Ismail

Afghanistan's President Ashraf Ghani (R) speaks to media and after Sharbat Gula (2nd R) the green-eyed Afghan woman arrived in Kabul, Afghanistan November 9, 2016. REUTERS/Mohammad Ismail

Afghanistan's President Ashraf Ghani (R) speaks to the media after Sharbat Gula (2nd R), the green-eyed "Afghan Girl" whose 1985 photo in National Geographic became a symbol of her country's wars, arrived in Kabul, Afghanistan November 9, 2016. REUTERS/Mohammad Ismail 

Sharbat Gula (L), the green-eyed "Afghan Girl" whose 1985 photo in National Geographic became a symbol of her country's wars, receives a key to an apartment from Afghanistan's President Ashraf Ghani, after she arrived in Kabul, Afghanistan November 9, 2016. REUTERS/Mohammad Ismail TPX IMAGES OF THE DAY

Afghanistan's President Ashraf Ghani (C) attends the Brussels Conference on Afghanistan, Belgium, October 5, 2016. REUTERS/Francois Lenoir

(L-R) Afghanistan's Chief Executive Abdullah Abdullah, President Ashraf Ghani, European Council President Donald Tusk and U.N. Secretary General Ban Ki-moon pose for a family photo during the Brussels Conference on Afghanistan, Belgium, October 5, 2016. REUTERS/Francois Lenoir

European Union foreign policy chief Federica Mogherini and Afghanistan's President Ashraf Ghani arrive to pose for a family photo during the Brussels Conference on Afghanistan, Belgium, October 5, 2016. REUTERS/Francois Lenoir

(Front Row L-R) Afghanistan's Chief Executive Abdullah Abdullah, President Ashraf Ghani, European Council President Donald Tusk, U.N. Secretary-General Ban Ki-moon, European Union foreign policy chief Federica Mogherini, U.S. Secretary of State John Kerry and Agha Khan pose for a family photo during the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

(Front Row L-R) Afghanistan's Chief Executive Abdullah Abdullah, President Ashraf Ghani, European Council President Donald Tusk, U.N. Secretary-General Ban Ki-moon, European Union foreign policy chief Federica Mogherini, U.S. Secretary of State John Kerry and Agha Khan pose for a family photo during the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

(Front Row L-R) Afghanistan's Chief Executive Abdullah Abdullah, President Ashraf Ghani, European Council President Donald Tusk, U.N. Secretary General Ban Ki-moon, European Union foreign policy chief Federica Mogherini, U.S. Secretary of State John Kerry, Agha Khan and Norway's Foreign Minister Borge Brende pose for a family photo during the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

(Front Row L-R) Afghanistan's Chief Executive Abdullah Abdullah, President Ashraf Ghani, European Council President Donald Tusk and U.N. Secretary General Ban Ki-moon pose for a family photo during the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

(L-R) Afghanistan's Chief Executive Abdullah Abdullah, President Ashraf Ghani and European Council President Donald Tusk attend the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

(L-R) Afghanistan's President Ashraf Ghani, European Council President Donald Tusk and European Union foreign policy chief Federica Mogherini attend the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

(L-R) Agha Khan, spiritual leader of Shia Ismaili Muslim community, greets Afghanistan's President Ashraf Ghani next to NATO Secretary-General Jens Stoltenberg during the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

(L-R) Agha Khan, spiritual leader of Shia Ismaili Muslim community, greets Afghanistan's President Ashraf Ghani next to NATO Secretary-General Jens Stoltenberg during the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

Afghanistan's President Ashraf Ghani and European Council President Donald Tusk (R) attend the Brussels Conference on Afghanistan, in Belgium, October 5, 2016. REUTERS/Francois Lenoir

Afghanistan's President Ashraf Ghani speaks during his visit at the joint National assembly gathering in Kabul, Afghanistan, April 25, 2016. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani speaks during his visit at the joint National assembly gathering in Kabul, Afghanistan, April 25, 2016. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani (R) and Speaker of Parliament Abdul Rauf Ibrahimi greets each other during Ghani's visit at the joint National assembly gathering in Kabul, Afghanistan, April 25, 2016. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani (C) stands at attention for the national anthem during his visit at the joint National assembly gathering in Kabul, Afghanistan, April 25, 2016. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani (C) prays before his speech during his visit at the joint National assembly gathering in Kabul, Afghanistan, April 25, 2016. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani (C) inspects the guard of honour during his visit at the joint National assembly gathering in Kabul, Afghanistan, April 25, 2016. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani (C) inspects the guard of honour during his visit at the joint National assembly gathering in Kabul, Afghanistan, April 25, 2016. REUTERS/Omar Sobhani

Afghanistan’s President Ashraf Ghani (2nd R) speaks during the Regional Economic Cooperation Conference of Afghanistan (RECCA) in Kabul, Afghanistan September 4, 2015. REUTERS/Omar Sobhani

Foreign delegation listen as Afghan President Ashraf Ghani (C) speaks during the Regional Economic Cooperation Conference of Afghanistan (RECCA) in Kabul, Afghanistan September 4, 2015. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani (C) talks to participants at an exhibition of Afghanistan products during the Regional Economic Cooperation Conference of Afghanistan (RECCA) in Kabul, Afghanistan September 4, 2015. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani (C) arrives to open an exhibition of Afghanistan's products during the Regional Economic Cooperation Conference of Afghanistan (RECCA) in Kabul, Afghanistan September 4, 2015. REUTERS/Omar Sobhani

Afghanistan’s President Ashraf Ghani (C) speaks during the Regional Economic Cooperation Conference of Afghanistan (RECCA) in Kabul, Afghanistan September 4, 2015. REUTERS/Omar Sobhani

Afghanistan’s President Ashraf Ghani (C) gestures as he arrives to attend the Regional Economic Cooperation Conference of Afghanistan (RECCA) in Kabul, Afghanistan September 4, 2015. REUTERS/Omar Sobhani

Afghanistan’s President Ashraf Ghani (C) poses for a photograph with foreign delegation at the Regional Economic Cooperation Conference of Afghanistan (RECCA) in Kabul, Afghanistan September 4, 2015. REUTERS/Omar Sobhani

Afghanistan’s President Ashraf Ghani (C) poses for a photograph with foreign delegation at the Regional Economic Cooperation Conference of Afghanistan (RECCA) in Kabul, Afghanistan September 4, 2015. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani (centre R) stands with Turkmenistan's President Gurbanguly Berdymukhamedov (centre L) during a guard of honor ceremony in Kabul, Afghanistan August 27, 2015. REUTERS/Jawad Jalali/Pool 

Afghan President Ashraf Ghani (R) and Turkmenistan's President Gurbanguly Berdymukhamedov (C) speak to journalists during their meeting in Kabul, Afghanistan, August 27, 2015. REUTERS/Jawad Jalali/Pool 

Afghanistan's President Ashraf Ghani (R) greets Turkmenistan's President Gurbanguly Berdymukhamedov during their meeting in Kabul, Afghanistan, August 27, 2015. REUTERS/Jawad Jalali/Pool

Afghanistan's President Ashraf Ghani (R) shakes hands with Turkmenistan's President Gurbanguly Berdymukhamedov after a news conference in Kabul, Afghanistan August 27, 2015. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani (2nd R) signs an agreement with Turkmenistan's President Gurbanguly Berdymukhamedov during a news conference in Kabul, Afghanistan August 27, 2015. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani (R) and Turkmenistan's President Gurbanguly Berdymukhamedov attend a news conference in Kabul, Afghanistan August 27, 2015. REUTERS/Omar Sobhani

Afghanistan's President Ashraf Ghani (R) and Turkmenistan's President Gurbanguly Berdymukhamedov attend a news conference in Kabul, Afghanistan August 27, 2015. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani (C) attends Afghan Independence Day celebrations in Kabul August 19, 2015. Afghanistan is celebrating the 96th anniversary of independence from Britain. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani attends Afghan Independence Day celebrations in Kabul August 19, 2015. Afghanistan is celebrating the 96th anniversary of independence from Britain. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani (C) attends Afghan Independence Day celebrations in Kabul August 19, 2015. Afghanistan is celebrating the 96th anniversary of independence from Britain. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani (C) attends Afghan Independence Day celebrations in Kabul August 19, 2015. Afghanistan is celebrating the 96th anniversary of independence from Britain. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani attends Afghan Independence Day celebrations in Kabul August 19, 2015. Afghanistan is celebrating the 96th anniversary of independence from Britain. REUTERS/Omar Sobhani

Afghan President Ashraf Ghani (C) attends Afghan Independence Day celebrations in Kabul August 19, 2015. Afghanistan is celebrating the 96th anniversary of independence from Britain. REUTERS/Omar Sobhani

An Afghan journalist takes a "selfie" as U.S. President Barack Obama (R) holds a joint news conference with Afghanistan's President Ashraf Ghani (C) at the White House in Washington March 24, 2015. REUTERS/Jonathan Ernst 

U.S. Secretary of State John Kerry and Afghanistan President Ashraf Ghani (L) smile during their news conference following diplomatic meetings at Camp David, Maryland March 23, 2015. REUTERS/Gary Cameron TPX IMAGES OF THE DAY

Afghanistan's President Ashraf Ghani (L) reaches out to shake hands with U.S. Secretary of Defense Chuck Hagel (not pictured) during an arrival ceremony at the Presidential Palace in Kabul December 6, 2014. The United States will keep up to 1,000 more soldiers than previously planned in Afghanistan into next year, outgoing U.S. Defense Secretary Chuck Hagel said on Saturday, in a recognition of the still formidable challenge from Taliban insurgents. REUTERS/Mark Wilson/Pool (AFGHANISTAN - Tags: POLITICS TPX IMAGES OF THE DAY) 

Afghanistan's President Ashraf Ghani speaks to delegates and ministers during the Conference on Afghanistan in London December 4, 2014. The United States and Britain pledged on Thursday to support Afghanistan's new unity government even as foreign combat troops withdraw from the country after a 13-year war that ousted the Islamist Taliban. U.S. Secretary of State John Kerry said President Ghani's new government had already made moves to combat money laundering and corruption since taking office in September in the first democratic transfer of power in Afghan history. REUTERS/Dan Kitwood/Pool (BRITAIN (POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) 

Chinese President Xi Jinping (R) and Afghan President Ashraf Ghani Ahmadzai attend a signing ceremony at the Great Hall of the People in Beijing October 28, 2014. REUTERS/Lintao Zhang/Pool (CHINA - Tags: POLITICS) 

A member of an honour guard adjusts the gun strap of his female compatriot ahead of a welcoming ceremony for Afghanistan's President Ashraf Ghani Ahmadzai outside the Great Hall of the People, in Beijing, October 28, 2014. REUTERS/Jason Lee (CHINA - Tags: POLITICS MILITARY) 

Chinese President Xi Jinping (Center L) meets Afghan President Ashraf Ghani Ahmadzai (Center R) at the Great Hall of the People in Beijing October 28, 2014. REUTERS/Lintao Zhang/Pool (CHINA - Tags: POLITICS) 

Chinese President Xi Jinping (R) with Afghan President Ashraf Ghani Ahmadzai attend a signing ceremony at the Great Hall of the People in Beijing October 28, 2014. REUTERS/Lintao Zhang/Pool (CHINA - Tags: POLITICS) 

Afghan President Ashraf Ghani Ahmadzai meets Chinese President Xi Jinping (not pictured) at the Great Hall of the People in Beijing October 28, 2014. REUTERS/Lintao Zhang/Pool (CHINA - Tags: POLITICS) 

Chinese President Xi Jinping (4th L) meets Afghan President Ashraf Ghani Ahmadzai (3rd R) at the Great Hall of the People in Beijing October 28, 2014. REUTERS/Lintao Zhang/Pool (CHINA - Tags: POLITICS)