U.S. Marine Tyler Vargas-Andrews was helping evacuate people from the Kabul airport when a suicide bomb went off. The blast killed more than 170 Afghans and 13 U.S. service members, two of whom were Vargas-Andrews’ closest friends. He was critically injured in the explosion when more than 150 ball bearings shredded his body. He lost his right arm and his left leg and sustained internal injuries too numerous to list. To date, he has undergone 45 surgeries.