PMEL
Arlen Gerdes, Precision Measurement Equipment Laboratory quality assurance, checks the accuracy of a micrometer depth gage to ensure the quality of PMEL’s work Nov. 14. The 90th Missile Maintenance Operations Squadron’s PMEL calibrates test equipment for units across F. E. Warren Air Force Base, Wyo., and the Wyoming Air National Guard. (U.S. Air Force photo by R.J. Oriez)