Senior Airman Petri Brand, a 35th Aerospace Medicine Squadron bioenvironmental engineer technician, prepares air quality testing equipment kit during a mandatory occupational health risk assessment of two Airmen sanding a precision guided munition at Misawa Air Base, Japan, May 11, 2017. Monthly water sampling and contingency operations are also among the duties Brand performs. (U.S. Air Force photo by Staff Sgt. Melanie A. Hutto)