Dion Nis­senbaum is a nation­al secu­ri­ty reporter for The Wall Street Jour­nal. Pre­vi­ous­ly, Dion was based in Afghanistan, where he trav­eled around the coun­try both as an inde­pen­dent jour­nal­ist and with the Unit­ed States mil­i­tary. He has won sev­er­al awards, includ­ing a Nation­al Press Club award for diplo­mat­ic correspondence.