Asadullah Haroon Gul, 40, was captured in 2007 by Afghan forces, turned over to the United States, and remains one of the last 39 detainees held at the prison at Guantánamo Bay, Cuba. He is also one of only two Afghans who remain out of 219 sent following the U.S. invasion of Afghanistan in 2001. President Joe Biden formally ended the U.S. war in Afghanistan in August.