U.S. Navy Ship's Serviceman Seaman Recruit Jesse Turtenwald, right, an in-port emergency team member, assists Logistics Specialist Seaman Recruit Eduardo Mendivil with donning his self-contained breathing apparatus face piece during a toxic gas drill aboard the aircraft carrier USS Abraham Lincoln (CVN 72) Oct. 30, 2013, in Newport News, Va. The ship was undergoing its midlife refueling and complex overhaul at Newport News Shipbuilding.