The United States officially ended its military presence with the final U.S. military flight out of Kabul, concluding 20 years of American involvement in Afghanistan after the Sept. 11, 2001, attacks. U.S. Central Command (CENTCOM) head Gen. Frank McKenzie said during a televised address that the last C-17 military plane cleared Afghan airspace after lifting off at around 3:29 p.m. ET Monday. That came hours before President Joe Biden’s Tuesday deadline for shutting down the final airlift. “I’m here to announce the completion of our withdrawal from Afghanistan and the end of the military mission to evacuation American citizens, third-country nationals, and vulnerable Afghans,” he said on Monday afternoon. There are still Americans who remain in Afghanistan “in the low hundreds,” said McKenzie in a response to a reporter’s question, adding that the military and State Department will work to evacuate those individuals. A Pentagon spokesman earlier on Monday said that …