170914-N-YM856-0011 PUERTO BARRIOS, Guatemala (Sept. 14, 2017) Builder Constructionman Marciano Castillo, assigned to Naval Mobile Construction Battalion 1, uses a tool to smooth concrete during construction of a new sidewalk at Comando Naval del Caribe, a Guatemalan naval base, during Southern Partnership Station 17 (SPS 17). SPS 17 is a U.S. Navy deployment executed by U.S. Naval Forces Southern Command/U.S. 4th Fleet, focused on subject matter expert exchanges with partner nation militaries and security forces in Central and South America. (U.S. Navy Combat Camera photo by Mass Communication Specialist 2nd Class Brittney Cannady)