KABUL, Afghanistan (AP) — Taliban forces sealed off Kabul's airport on Saturday to most Afghans hoping for evacuation, as the U.S. and its allies wound down a chaotic airlift that will end their troops' two decades in Afghanistan.

Western leaders acknowledged that their withdrawal would mean leaving behind some of their citizens and many locals who helped them over the years, and they vowed to try to continue working with the Taliban to allow local allies to leave after President Joe Biden's Tuesday's deadline to withdraw from the country.

Although most of its allies had finished their evacuat...