CAMP LEJEUNE, N.C. (May 19, 2023) Hospital Corpsman 2nd Class Dane Marcotte with Marine Wing Support Squadron 272, 2nd Marine Air Wing checks for respiration on a simulated causality during a tactical causality combat care (TCCC) Tier Three instructor test at Battle Skills Training School Camp Lejeune, North Carolina, May 18, 2023. Sailors with 2nd Marine Logistics Group hosted a TCCC Tier Three instructor course for corpsman from around II Marine Expeditionary Force to become instructors. (U.S. Marine Corps photo by Sgt. Scott Jenkins)