U.S. Marine Corps Lance Cpl. Lucas M. Kidder, a landing

U.S. Marine Corps Lance Cpl. Lucas M. Kidder, a landing support specialist with Combat Logistics Battalion 2, Combat Logistics Regiment 2, 2nd Marine Logistics Group, walks mules out of their pen 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. 1, 2020. The course teaches students to use mules to travel through difficult terrain with mission-essential gear. (U.S. Marine Corps photo by Cpl. Rachel K. Young-Porter)