Walter Cronkite, from an autographed photo given to Mr. McClelland.
"Clark, it is as impossible to confirm them (UFOs) in the present as it will be to deny them in the future."
Dr. Wernher von Braun (deceased), space flight pioneer and NASA scientist.
Brian Duffy, NASA astronaut and Space Shuttle Mission Commander."
Kathy Thornton, NASA astronaut and space walker who helped repair the Hubble Space Telescope in orbit.
Dr. Sally Ride, NASA Astronaut and first American woman in space.
Major Donald E. Keyhoe (deceased), former International Director, National Investigations Committee on Aerial Phenomena, Washington, DC.
Dr. J. Alan Hynek (deceased), Director, The Center for UFO Studies.