Missouri Army National Guard Staff Sgt. Keith Neiman, a crew chief assigned to the 1-135th Attack Reconnaissance Battalion Army Aviation Support Facility #1, performs routine maintenance on a UH-60 Black Hawk utility helicopter at Whiteman Air Force Base, Mo., April 1, 2016. More than 90 enlisted aircraft maintainers, who previously only worked on the AH-64 Apache, are in the process of certifying to perform maintenance on Black Hawks following the helicopter’s recent arrival. (U.S. Air Force photo by Airman 1st Class Michaela R. Slanchik)