Patient Surgery Navy Cmdr. Gavin Dunn, left, and Lt. Cmdr. Patrick Morrissey perform a surgery on a patient in an operating room aboard the USNS Mercy in Los Angeles, April 18, 2020. The USNS Mercy deployed in support of the nation's COVID-19 response efforts. SHARE: Download: Full Size (1.08 MB) Tags: Navy, Coronavirus Credit: Navy Petty Officer 2nd Class Ryan M. Breeden VIRIN: 200418-N-PH222-1789M.JPG Photo Gallery