181207-N-QM691-1495 VALPARAISO, Chile (Dec. 7, 2018) Cmdr. Jeffrey Chao, second from left, the Littoral Combat Group One (LCG-1) surgeon, performs an exploratory laparotomy as other medical team members assist aboard the San Antonio-class amphibious transport dock ship USS Somerset (LPD 25), Dec. 7, 2018, while underway in the Pacific Ocean. Somerset is part of LCG-1, which is deployed in support of the Enduring Promise Initiative to reaffirm U.S. Southern Command's longstanding commitment to the nations of the Western Hemisphere. (U.S. Navy Photo by Mass Communication Specialist 1st Class Andrew Brame/Released)