CARTAGENA, COLOMBIA (July 18, 2023) A Colombian Diver enters the water during multinational diving operations with Mobile Diving and Salvage Unit 2 (MDSU 2) during UNITAS LXIV, July. 18, 2023. UNITAS is the world’s longest-running maritime exercise. Hosted this year by Colombia, it brings together multinational forces from 20 partner nations, including 26 warships/vessels, three submarines, 25 aircraft (fixed wing/helicopter) and approximately 7,000 people. The exercise trains forces in joint maritime operations that enhance tactical proficiency and increase interoperability with the presence of unmanned air, surface, and submarine systems. (U.S. Navy photo by Mass Communication Specialist 1st Class Hunter S. Harwell)