A military helicopter flies over Kabul, Afghanistan, August 15, 2021.

Afghan men cross a road in Kabul, Afghanistan, August 15, 2021.

People arriving from Afghanistan make their way at the Friendship Gate crossing point at the Pakistan-Afghanistan border town of Chaman, Pakistan August 13, 2021.

Ismail Khan, a veteran local commander leading militia resistance in Herat, Afghanistan, speaks to a Taliban media arm while in their custody, in this screen grab taken from an undated video from social media uploaded on August 13, 2021. TALIBAN HANDOUT/via REUTERS

People wait to cross into Afghanistan, at the Friendship Gate crossing point at the Pakistan-Afghanistan border town of Chaman, Pakistan August 13, 2021.

Afghan acting Defense Minister, General Bismillah Khan Mohammadi speaks to camera, in Kabul, Afghanistan August 15, 2021 in this still image taken from video. Ministry of Defense, Afghanistan/Handout via REUTERS

An Afghan soldier stands in a military vehicle on a street in Kabul, Afghanistan, August 15, 2021.

Taliban militants waving a Taliban flag on the back of a pickup truck drive past a crowded street at Pashtunistan Square area in Jalalabad, Afghanistan in this still image taken from social media video uploaded on August 15, 2021. Social media website/via REUTERS

People gather in the Eid Gah Darwaza area as a flag is hoisted on the Kandahar city gate, in Kandahar, Afghanistan in this screen grab taken from a handout video uploaded on social media August 14, 2021. Taliban Handout/via REUTERS

A fighter stands guard next to a Taliban flag raised at the gates outside the police headquarters, in city of Ghazni, Afghanistan in this screen grab taken from a video released by the Taliban on August 12, 2021. Taliban Handout/via REUTERS

Taliban fighters gather on main road intersection in city of Ghazni, Afghanistan in this screen grab taken from a video released by the Taliban on August 12, 2021. Taliban Handout/via REUTERS

Queued vehicles wait to cross the Friendship Gate crossing point in the Pakistan-Afghanistan border town of Chaman, Pakistan August 15, 2021.

Afghan passengers walk toward the airport in Kabul, Afghanistan, August 15, 2021.

People arrive from Afghanistan at the Friendship Gate crossing point at the Pakistan-Afghanistan border town of Chaman, Pakistan August 15, 2021.

People arriving from Afghanistan make their way at the Friendship Gate crossing point at the Pakistan-Afghanistan border town of Chaman, Pakistan August 15, 2021.

U.S. Army Apache helicopter flies over Kabul, Afghanistan August 15, 2021.

People wait to cross into Afghanistan, at the Friendship Gate crossing point at the Pakistan-Afghanistan border town of Chaman, Pakistan August 13, 2021.

People wait to cross at the Friendship Gate crossing point at the Pakistan-Afghanistan border town of Chaman, Pakistan August 15, 2021.

People cross into Afghanistan, as others arrive in Pakistan, at the Friendship Gate crossing point at the Pakistan-Afghanistan border town of Chaman, Pakistan August 15, 2021.

U.S. Army Chinook helicopter flies over Kabul, Afghanistan August 15, 2021.