U.S. Air Force Reserve Tech Sgt. Christopher Holmes, aircraft electrician, 913th Maintenance Squadron, instructs Airmen how to apply a tourniquet to themselves under combat conditions during Self-Aid Buddy Care (SABC) Hands-On training Dec. 2, 2017, at Little Rock Air Force Base, Ark. SABC training provides knowledge and skills to minimize injury and prevent death or disability in deployed environments or home station emergencies. (U.S. Air Force photo by Master Sgt. Jeff Walston/Released)