U.S. Marine Corps Cpl. William L. Stewart poses for

U.S. Marine Corps Cpl. William L. Stewart poses for a portrait during an Animal Packer Course as a part of Mountain Training Exercise 1-21 at the Marine Corps Mountain Warfare Training Center in California on Oct. 9, 2020. Stewart, a landing support specialist with Combat Logistics Battalion 2, Combat Logistics Regiment 2, learned to use mules to travel through difficult terrain with mission-essential gear. (U.S. Marine Corps photo by Cpl. Rachel K. Young-Porter)