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BREMERTON, Washington (March 1, 2017) Lt. Patrick Riffle, a Navy chaplain assigned to USS Nimitz (CVN 68), conducts Catholic Mass during an Ash Wednesday celebration for Sailors assigned to USS John C. Stennis (CVN 74). The celebration took place on a berthing barge used to provide living and workspace as well as basic services during the ongoing maintenance period. John C. Stennis is conducting a planned incremental availability (PIA) at Puget Sound Naval Shipyard and Intermediate Maintenance Facility, during which the ship is undergoing scheduled maintenance and upgrades. (U.S. Navy photo by Mass Communication Specialist 3rd Class Sierra D. Langdon / Released)