PACIFIC OCEAN - Fireman Chester Burton, dons a chemical, biological, radiation or nuclear (CBRN) mask during a general quarters drill aboard the U.S. Coast Guard Cutter Bertholf, Aug. 13, 2009. The drill was designed to train crewmembers on the proper wear of personal protective clothing and equipment during a CBRN attack. (Coast Guard photo/Petty Officer 2nd Class Jetta H. Disco)
Subscribe
