190314-N-AD347-1152 PHILIPPINE SEA (March 14, 2019) Marines assigned to 3rd Reconnaissance Battalion work with the Avenger-class mine countermeasures ship USS Pioneer (MCM 9) to conduct a mine hunting training exercise. Pioneer, part of Mine Countermeasure Squadron 7, is operating in the U.S. 7th Fleet area of operations to enhance interoperability with partners and serve as a ready-response platform for contingency operations. (U.S. Navy photo by LTJG Alexander Fairbanks/Released)