Meeting the  Aug. 31 deadline to withdraw from the Taliban-led nation, the last plane carrying U.S. forces left Afghanistan on Monday, after 20 years of war that left nearly 2,500 American troops dead and spanned four presidencies. Gen. Kenneth McKenzie Jr. said the withdrawal signified "both the end of the military component of the evacuation, but also the end of the nearly 20-year mission that began in Afghanistan" shortly after 9/11. "While the voluntary evacuation is complete, the diplomatic mission to ensure additional US citizens and eligible Afghans who want to leave continues." The Biden administration has spent weeks scrambling to evacuate Americans and Afghan translators who helped the American military after the Taliban quickly gained control of Kabul on Aug. 15. The withdrawal also comes in the aftermath of an ISIS-K suicide bombing that killed dozens of people, including 13 U.S. service members, on Thursday. The U.S. retaliated with airstrikes targeting Islamic extremists on Friday and Sunday. Evacuations originally began in July with more than 120,000 people evacuated out of Afghanistan as of Monday, including about 6,000 Americans. 📸: Aamir Qureshi, @AFP/@GettyImages