Photographer Louis Palu’s depiction of U.S. Marine Corporal Philip Pepper is stark. The 22-year-old is seen in a close-up, helmet on, his face dirty from the dusty roads his convoy has been on. The black-and-white portrait, U.S. Marine Cpl. Philip Pepper, Age 22, Garmsir, Helmand, Afghanistan (seen below), shows Pepper’s…