  | 
			An 
			AH-1 helicopter escorts a UH-1Y helicopter while U.S. Marine Corps 
			Staff Sgt. Bryan E. Campbell prepares an M2.50 caliber machine gun 
			in support of counter-piracy surveillance operations over the Gulf 
			of Aden, April 6, 2009. 
			Sgt. 
			Anthony Petro, left, accompanied the crew during their flight. 
			Campbell is a crew chief assigned to the 13th Marine Expeditionary 
			Unit and Petro is assigned to the Battalion Landing Team, 1st 
			Battalion, 1st Regiment.  
			U.S. 
			Marine Corps photo by Lance Cpl. Robert C. Medina  |