The legendary FBI agent in charge of New York’s counterterrorism division, Carlos T. Fernandez, is retiring after 21 years. Fernandez, 50, was posted in Yemen after the USS Cole bombing, in Afghanistan after 9/11 and in Libya after Benghazi. He is joining Viacom as their global head of security at their Times Square headquarters. Insiders say the media giant has hired him to lead all of their security teams on a global basis, protect their offices and digital systems, and ensure the safety of Viacom staff and guests who attend their events.