Keywords: Chemical, Biological, Radiological and Nuclear Defense Training DVIDS195720.jpg en Petty Officer 1st Class Claude Lewis chemical and biological defense officer at Fleet Activities Sasebo helps Petty Officer 2nd Class Alvera McKnight from Covington La don her MCU-2P gas mask during a chemical biological radiological and nuclear defense training course The course is required training for all active duty personnel in Sasebo 2009-08-12 Petty Officer 2nd Class Joshua Wahl https //www dvidshub net/image/195720 090812-N-+++++-411 2009-08-17 14 59 SASEBO JP PD-USGov-Military-Navy Gas masks of the United States Images from DoD uploaded by Fæ Males wearing gas masks Females wearing gas masks |