U.S. Air Force Chief Master Sgt. Randy Kwiatkowski, Third Air Force command chief, observes a precision measurement equipment laboratory technician calibrate a firing pin protrusion gauge at Aviano Air Base, Italy, Feb. 11, 2021. Firing pin protrusion gauges are used to perform weapon system inspections for the 31st Security Forces Squadron. (U.S. Air Force photo by Staff. Sgt. Savannah L. Waters)