Seaman Charles E. Ermel, from Pryor, Okla., dons a gas mask during a chemical, biological, radiological general quarters drill aboard the Arleigh Burke-class guided-missile destroyer USS Dewey. Dewey is deployed in the U.S. 5th Fleet area of operations supporting Operation Inherent Resolve, strike operations in Iraq and Syria as directed, maritime security operations, and theater security cooperation efforts in the region.