sentences:  He returned to his home country in 1988 to fight with the mujahideen under their commander Ahmed Shah Massoud, who assigned Amin to Afghanistan's embassy in Washington in 1990.Amin worked for the foreign ministry in various capacities until the government's fall to the Taliban in 1996.At the time of the 9/11 attacks, Amin was serving as a diplomat of the Afghan mission to the United Nations.