Refining Techniques Marines practice room clearing techniques at Fire Base Gloria, Camp Pendleton, Calif., Jan. 29, 2018. The refined techniques and procedures enhance the ability of Marines to conduct raid operations while deployed. Marine Corps photo by Cpl. Danny Gonzalez SHARE IMAGE: Download Image: Full Size (2.15 MB) Photo By: Cpl. Danny Gonzalez VIRIN: 180129-M-MR595-1068C.JPG Photo Gallery