Hernia Surgery Navy Cmdr. (Dr.) Matthew Bradley performs an umbilical hernia operation aboard the hospital ship USNS Comfort, Oct. 22, 2018. The Comfort participated in an 11-week medical support mission to Central and South America as part of U.S. Southern Command’s Enduring Promise initiative. SHARE: Download: Full Size (4 MB) Tags: humanitarian aid, Southern Command, Navy Credit: Navy Seaman J. Keith Wilson VIRIN: 181022-N-SG189-1041.JPG Photo Gallery