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