A U.S. Marine Corps CH-53E Super Stallion helicopter assigned to Marine Medium Tiltrotor Squadron (VMM) 261 lowers an M777 howitzer during a certification exercise (CERTEX) at Camp Lejeune, N.C., Feb. 14, 2012. VMM-261 and Marines assigned to the 24th Marine Expeditionary Unit participated in the CERTEX in preparation for a scheduled deployment. (DoD photo by Lance Cpl. Michael Petersheim, U.S. Marine Corps/Released)
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