U.S. Navy Builder 3rd Class Zachary Paiva (left) and Hospital Corpsman 2nd Class Nathan Cantrelle (right), assigned to Naval Mobile Construction Battalion (NMCB) 133, use grinding stones to smooth out concrete in Riohacha, Colombia, Sept. 25, 2018, during water-well drilling exploration operations as part of Southern Partnership Station 2018. Southern Partnership Station is a U.S. Southern Command-sponsored and U.S. Naval Forces Southern Command/U.S. 4th Fleet-conducted annual deployment focused on subject matter expert exchanges and building partner capacity in a variety of disciplines including medicine, construction and dive operations in the Caribbean, Central and South America. (U.S. Army photo by Staff Sgt. Kalie Frantz)