Mercy Security Marine Corps Pfc. Arnoldo Romero Velazco, with 1st Battalion, 4th Marine Regiment, 1st Marine Division, posts security to secure the hospital ship USNS Mercy in Los Angeles, March 27, 2020. The Mercy deployed in support of the nation’s COVID-19 response efforts, and will serve as a referral hospital for non-COVID-19 patients, allowing shore-based hospitals to focus their efforts on COVID-19 cases. SHARE: Download: Full Size (3.22 MB) Tags: Navy, Marine Corps, Coronavirus Credit: Marine Corps Cpl. Alexa M. Hernandez VIRIN: 200327-M-VO343-2036A.JPG Photo Gallery