Naval Air Crewman 3rd Class John Porcuna, left, and Naval Air Crewman 2nd Class Jeff Coonce, both assigned to Helicopter Mine Countermeasures Squadron (HM) 15, lower a Mk 104 acoustic mine sweeping device out the back of an MH-53E Sea Dragon helicopter during over-water training. HM-15 is assigned to Commander, Task Force 52, promoting mine countermeasures in the U.S. 5th Fleet area of responsibility. (U.S. Navy photo by Mass Communications Specialist 1st Class Daniel Gay/Released)