In this Thursday, Nov. 23, 2017 photo provided by Brazil's Air Force, Brazilian military aid in the search for Argentina's missing submarine as they fly on a mission over the South Atlantic, after leaving a base in Bahia Blanca, Argentina. Argentina's president said Friday that an international search will continue for a submarine carrying 44 crew members that has been lost in the South Atlantic for nine days and that the sub's disappearance will be investigated. (Brazilian Air Force via AP)