150331-N-WD757-073 CORONADO, Calif. (March 31, 2015) Mass Communication Specialist 3rd Class Emiline Senn, assigned to Navy Public Affairs Support Element West, tests a chemical, biological, and radiological gas mask for an airtight seal during a fitting and gear issue at Naval Air Station North Island. (U.S. Navy photo by Mass Communication Specialist 2nd Class Carlos M. Vazquez II/Released)