U.S. Navy Petty Officer 1st Class Carlos Sanchez (left), assigned to Naval Mobile Construction Battalion 28 Detail Bravo, applies concrete sealant to a sewage pipe while Marine Corps Lance Cpl. Stephen Mcdonaldhale, assigned to 2nd Marine Logistics Group, holds it steady at Escuela Eloy Alfaro School in Manta, Ecuador, on Jan. 5, 2011. U.S. sailors, Marines and Ecuadorian naval infantrymen partnered at the school for week-long subject matter expert exchange during Southern Partnership Station 2011, an annual deployment of U.S. ships to the U.S. Southern Command's area of responsibility in the Caribbean and Latin America involving information sharing with navies, coast guards and civilian services throughout the region.