Seaman Pierce Overbeeke, assigned to Aids to Navigation Team Kennewick, Wash., counts the flashes of a light on an aid to navigation along the Snake River in eastern Washington, Sept. 23, 2014. The crew members covered the navigation lights to simulate night and then counted the lights flashes to ensure the light would properly work during periods of darkness. (U.S. Coast Guard photo by Chief Petty Officer David Mosley)
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