Lance Cpl. Ryan Sappenfield, a chemical, biological,

Lance Cpl. Ryan Sappenfield, a chemical, biological, radiological and nuclear (CBRN) defense specialist with the CBRN response element (CRE), 31st Marine Expeditionary Unit, samples air with a wireless, portable, multi-threat, monitor for radiation and chemical detection during CBRN response training at Camp Hansen, Okinawa, Japan, Feb. 1, 2017. The CRE conducted full scale detection and decontamination training with Marine Corps Installations Pacific - Fire and Emergency Services personnel observing. As the Marine Corps’ only continuously forward-deployed unit, the 31st MEU air-ground-logistics team provides a flexible force, ready to perform a wide range of military operations, from limited combat to humanitarian assistance operations, throughout the Indo-Asia Pacific region. (U.S. Marine Corps photo by Cpl. Darien J. Bjorndal/ Released)