Petty Officer 2nd Class Russell Butterfield, left, and Petty Officer 3rd Class Zach Brown, assigned to Mine Countermeasures Squadron 15, perform maintenance on an MH-53E Sea Dragon helicopter on the flight deck of the amphibious assault ship USS Tarawa during Fuerzas Aliadas PANAMAX 2008. FA PANAMAX 2008 is a multi-national training exercise tailored to the defense of the Panama Canal, involving civil and military forces from the U. S. Southern Command area of focus.