170202-N-YL073-254 PUERTO BARRIOS, Guatemala (Feb. 2, 2017) Cmdr. Christopher Crecelius, assigned to Walter Reed National Military Medical Center in Bethesda, Md, preforms dental work on a patient during Continuing Promise 2017. The exercise is a U.S. Southern Command-sponsored and U.S. Naval Forces Southern Command/U.S. 4th Fleet-conducted deployment to conduct civil-military operations including humanitarian assistance, training engagements, and medical, dental, and veterinary support to Central and South America. (U.S. Navy photo by Mass Communication Specialist 2nd Class Shamira Purifoy/Released)