Marine Corps Cpl. Joshua Hatfield, left, and Lance Cpl. Mellisa Leathery collect simulated biological contamination gathered during a handheld assay in Combat Town, Okinawa, Japan, March 21, 2017. Hatfield is the recon team leader and Leathery is a recon team member with the 3rd Marine Division's Chemical, Biological, Radiological and Nuclear Platoon. Marine Corps photo by Combat Camera Lance Cpl. Jesus McCloud