Argentina searches for missing navy submarine

Comandante Espora Argentine ship sails off the navel base in Mar del Plata, Argentina, Saturday, Nov. 18, 2017. This ship is is part of a searching crew to find a submarine that hadn't been heard from in three days. Authorities last had contact with the German-built diesel-electric sub, the ARA San Juan, on Wednesday as it was on a voyage from the extreme southern port of Ushuaia to Mar del Plata. [Photo: AP]