The U. S. government has been covering up evidence of extraterrestrial visits for more than 50 years, an array of 20 retired Air Force, Federal Aviation Administration and intelligence officers said recently. They demanded Congress hold hearings on what they say is longstanding secret U.S. involvement with UFOs and extraterrestrials. (46)John Callahan, a former FAA division chief of accidents and investigations, said he was directed by CIA officers to cover up a Nov. 18, 1986, incident involving a UFO and a Japanese airliner near Anchorage, Alaska. Michael Smith, a former U.S. Air Force air traffic controller stationed near Klamath Falls, Ore., in the 1960s and early 1970s, reported seeing a UFO hovering at 80,000 feet one night. "I was told you keep it to yourself," he said. "NORAD(North American Aerospace Defense Command) called me one night to say there&39;s a UFO coming up the California coastline. I asked them what to do. (47)" Donna Hare, a NASA design illustrator with secret clearance, said UFOs were routinely airbrushed out of high altitude photos of the Earth before being released to the public. (48)Apollo astronauts, she said, had spotted UFOs, but they "are told to keep this quiet and not to talk about it, "she said. Karl Wolf, an Air Force sergeant who was assigned to the National Security Agency, said that mysterious structures were discovered on the far side of the moon when the United States was mapping its surface before the 1969 lunar landing.(49). (50)Despite the government&39;s refusal to discuss the issue, several witnesses have also told of being stationed at military bases or near silos containing nuclear missiles when a UFO swung by. Afterward, military officers would discover the missiles had been temporarily deactivated. (46) A. They said nothing, not to write it down.B. The 20 witnesses, it is said, were a fraction of the 400 people who are willing to testify.C. The Pentagon does not comment on UFOs, expect to say they do not exist and that such objects really are high altitude balloons or military aircraft.D. "We always airbrush them out before we release them to the public," one technician told her.E. These have been retrieved from a purported crash in July 1947.F. These photos too were culled out of the public record. (47) A. They said nothing, not to write it down.B. The 20 witnesses, it is said, were a fraction of the 400 people who are willing to testify.C. The Pentagon does not comment on UFOs, expect to say they do not exist and that such objects really are high altitude balloons or military aircraft.D. "We always airbrush them out before we release them to the public," one technician told her.E. These have been retrieved from a purported crash in July 1947.F. These photos too were culled out of the public record. (48) A. They said nothing, not to write it down.B. The 20 witnesses, it is said, were a fraction of the 400 people who are willing to testify.C. The Pentagon does not comment on UFOs, expect to say they do not exist and that such objects really are high altitude balloons or military aircraft.D. "We always airbrush them out before we release them to the public," one technician told her.E. These have been retrieved from a purported crash in July 1947.F. These photos too were culled out of the public record. (49) A. They said nothing, not to write it down.B. The 20 witnesses, it is said, were a fraction of the 400 people who are willing to testify.C. The Pentagon does not comment on UFOs, expect to say they do not exist and that such objects really are high altitude balloons or military aircraft.D. "We always airbrush them out before we release them to the public," one technician told her.E. These have been retrieved from a purported crash in July 1947.F. These photos too were culled out of the public record. (50) A. They said nothing, not to write it down.B. The 20 witnesses, it is said, were a fraction of the 400 people who are willing to testify.C. The Pentagon does not comment on UFOs, expect to say they do not exist and that such objects really are high altitude balloons or military aircraft.D. "We always airbrush them out before we release them to the public," one technician told her.E. These have been retrieved from a purported crash in July 1947.F. These photos too were culled out of the public record.