Aerial Fire Marine Corps Sgt. Nicholas Luber fires a machine gun during a training flight over Naval Air Facility El Centro, Calif., Sept. 4, 2020. SHARE IMAGE: Download Image: Full Size (0.41 MB) Tags: Marine Corps, Training Photo By: Marine Corps Lance Cpl. Gavin Umboh VIRIN: 200904-M-GZ855-1311C.JPG Photo Gallery