WASHINGTON, D.C. -- During a Senate Armed Services Committee hearing today, U.S. Senator Martin Heinrich (D-N.M.) questioned senior intelligence officials about cybersecurity threats, including Russia's hacking of the U.S. presidential election. The committee received testimony from Director Of National Intelligence James R. Clapper, Jr.; Under Secretary Of Defense For Intelligence Marcel J. Lettre; and Admiral Michael S. Rogers, Commander, United States Cyber Command / Director, National Security Agency / Chief, Central Security Services.