HOUR ONE (Photo: GRU General Igor Sergun (l.) (1957-2016) with Prime Minuster Dmitry Medvedev (r.) and staff in a tour of GRU Headquarters, Moscow. GRU (Russian: ГРУ; IPA: [geeˈru]), is the foreign military intelligence main directorate of the General Staff of the Armed Forces of the Russian Federation) ‬Sudden Death in the GRU & the Chill of the New Cold War: 2/3/16: Peter Zwack, National Defense University’s Institute of National Security Studies, Defense One.