English: Sgt. Rebecca N. Rutherford, feeds a round into a 60 mm mortar system while Sgt. Elizabeth A. Dollinger keeps the weapon on target in preparation for fire during a pilot test at Range 107, Marine Corps Air Ground Combat Center Twentynine Palms, California, March 2, 2015, in preparation for the Marine Corps Operational Test and Evaluation Activity assessment. Rutherford and Dollinger are both mortarmen with Weapons Company, Ground Combat Element Integrated Task Force. From October 2014 to July 2015, the GCEITF will conduct individual and collective level skills training in designated ground combat arms occupational specialties in order to facilitate the standards-based assessment of the physical performance of Marines in a simulated operating environment performing specific ground combat arms tasks. (U.S. Marine Corps photo by Sgt. Alicia R. Leaders/Released)