The disappearance of retired Major General William Neil McCasland is a “grave national security crisis,” as he is a man “with some of the most sensitive secrets of the United States in his head,” investigative journalist Ross Coulthart said. McCasland, 68, who led major Air Force science and technology portfolios, has been missing since February 27. McCasland’s roles placed him near highly classified programs. His disappearance has drawn attention because of his senior roles in military space and technology programs, including leadership of the Air Force Research Laboratory and work tied to sites historically associated with UFO investigations. His vanishing...