Senior Airman Nicholas Carter, 15th Aerospace Medicine Squadron dental lab technician, cuts a mouth guard away from its mold on Joint Base Pearl Harbor-Hickam, Hawaii, March 4, 2019. A mouth guard is a piece of soft plastic that protects the lips, cheeks, tongue, teeth and the jaw, absorbing the force of impact from another object before the force reaches the teeth. (U.S. Air Force photo by Tech. Sgt. Heather Redman)