Airman 1st Class Todd Perentin, 621st Contingency Response Support Squadron aerial porter, helps load equipment in Comodoro Riadavia, Argentina, December 2, 2017. The equipment is part of the submarine rescue diving and reconpression system that is being used to support the recovery mission of the missing Armada de la Republica Argentina San Juan submarine. (U.S. Air Force photo by Staff Sgt. Eric Alvarado/RELEASED)