The National Investigations Committee On Aerial Phenomena was formed in 1956, with the organization's corporate charter being approved October 24. Hillenkoetter was on NICAP's board of governors from about 1957 until 1962. Donald E. Keyhoe, NICAP director and Hillenkoetter's NavalAcademy classmate, wrote that Hillenkoetter wanted public disclosure of UFO evidence. Perhaps Hillenkoetter's best-known statement on the subject was in 1960 in a letter to Congress, as reported in The New York Times: "Behind the scenes, high-ranking Air Force officers are soberly concerned about UFOs. But through official secrecy and ridicule, many citizens are led to believe the unknown flying objects are nonsense."