UFOs remain essentially a military and intelligence problem - and one demanding unprecedented security and deception, with access to information on a strictly 'need to know' basis. As early as 1960 former CIA director Admiral Hillenkoetter confirmed that, 'Behind the scenes, high-ranking air force officers are soberly concerned about the UFOs. But through official secrecy and ridicule, many citizens are led to believe the unknown flying objects are nonsense.' The same could be said today. Based on many years of research by one of the world's most respected authorities on alien phenomena, Need to Know draws on top-secret documents, reports of encounters with large craft of unknown origin from pilots and personnel aboard aircraft carriers and destroyers and interviews with high-ranking military insiders. It is full of revelations, including the alarming escalation of aircraft accidents and the disappearance of hundreds of military aircraft during UFO encounters and recent near-misses with UFOs. The evidence is clear, balanced - and irrefutable.