US President Donald Trump shakes hands during a meeting with Afghan President Ashraf Ghani during a surprise Thanksgiving Day visit, at Bagram Air Field, Afghanistan.

US President Donald Trump addresses members of the military during a surprise Thanksgiving Day visit at Bagram Air Field, Afghanistan.

US President Donald Trump speaking to members of the military during a surprise Thanksgiving Day visit, at Bagram Air Field, Afghanistan.

Afghan President Ashraf Ghani speaks during a ceremony to introduce the new chief of the intelligence service, in Kabul, Afghanistan. Ghani, whose government was sidelined in the U...

US Secretary of State Mike Pompeo, center left, walks with Afghan President Ashraf Ghani's Chief of Staff Abdul Salam Rahimi, as he arrives at the Presidential Palace in Kabul, Afg...

Former Afghan President Hamid Karzai, center, walks in a hall as he attends the "intra-Afghan" talks in Moscow, Russia. The U.S. has promised to withdraw half of its troops from Af...

U.S. Secretary for Defense Jim Mattis, center, walks off the podium with NATO Secretary General Jens Stoltenberg, left, and British Defense Minister Gavin Williamson, right, after ...

Pakistanis rally against America in Lahore, Pakistan. Protesters objected to President Donald Trump's allegation that Islamabad is harboring militants who battle U.S. forces in Afg...

Secretary of State Rex Tillerson leaves after speaking at the State Department in Washington, to discuss Afghanistan.

Afghan National Army soldiers stand guard at a checkpoint on the outskirts of Kabul, Afghanistan. Deep in the mountains of eastern Afghanistan, on the front lines against Taliban a...

President Donald Trump speaks at Fort Myer in Arlington Virginia, during a Presidential Address to the Nation about a strategy he believes will best position the U.S. to eventually...

U.S. Defense Secretary James Mattis, meets with the defense minister and other members of the Afghan delegation at Resolute Support headquarters, in Kabul Afghanistan. Mattis arriv...

US President Barack Obama waves as he and Afghanistan's President Ashraf Ghani conclude their news conference in the East Room of the White House in Washington, USA.

Afghan Chief Executive Abdullah Abdullah, Afghan President Ashraf Ghani, Secretary of State John Kerry, and Secretary of Defense Ash Carter greet each other after a news conference...

Shah Bibi Tarakhail, a six-year-old Afghan girl whose love of painting won the hearts of US doctors who fit her with a prosthetic, with her host mother, Ann Drummond, at Shriners H...

President Barack Obama being briefed by Marine General Joseph Dunford, commander of the US-led International Security Assistance Force (ISAF), right, and US Ambassador to Afghanist...

Soldiers’ pay Injured US soldiers await evacuation by helicopter from Kamdesh, in Nuristan, August 2006

FILE - In this file image taken on Oct. 4, 2009, Pakistan's new Taliban leader Hakimullah Mehsud, center, operates light machine gun with his comrades in Sararogha in Pakistani tri...

FILE - In this file photo taken Sunday, Oct. 4, 2009, new Pakistani Taliban chief Hakimullah Mehsud, left, is seen with his comrade Waliur Rehman, front center, during his meeting ...

Hands up US marines frisking an Afghan man