The disappearance of a retired Air Force general who once oversaw billions of dollars in military research has drawn federal investigators into the search and fueled a wave of online conspiracy theories about classified programs and unidentified flying objects. Retired Maj. Gen. William “Neil” McCasland, a former commander of the Air Force Research Laboratory, has been missing since Feb. 27, when he disappeared from his home in Albuquerque, New Mexico. Local authorities are leading the