Defense officials say the men went missing during a boarding mission in the Gulf of Aden. WATCH THE FULL EPISODE OF 'WORLD NEWS TONIGHT': https://bit.ly/3mscXkB WATCH OTHER FULL EPISODES OF WORLD NEWS TONIGHT: http://abc.go.com/shows/world-news-tonight WATCH WORLD NEWS TONIGHT ON HULU: https://bit.ly/3iQLwPp #navyseals #missing #gulfofaden #wnt #abcnews