Machinist's Mate 2nd Class Thomas Mesenbrink tests a boiler water sample in the oil lab of amphibious assault ship USS Peleliu (LHA 5) while underway to participate in Amphibious Landing Exercise (PHIBLEX) 2015. PHIBLEX is an annual, bilateral training exercise conducted by the Armed Forces of the Philippines, U.S. Marines and Navy to strengthen interoperability across a range of capabilities to include disaster relief and contingency operations. (U.S. Navy photo by Mass Communication Specialist 3rd Class Dustin Knight/Released)