U.S. Air Force Senior Master Sgt. select Melissa Grino, 17th Operational Medical Readiness Squadron dental flight chief, fist bumps coworkers and friends who came to support her during the senior master sgt. release party at the event center on Goodfellow Air Force Base, Texas, March 3, 2020. Senior master sgt. is in the highest tier of the enlisted rank structure and only one rank away from the highest enlisted rank in the Air Force. (U.S. Air Force photo by Senior Airman Seraiah Wolf)