UFO Researcher Michael Hall joins me to discuss a stunning UFO memo from a high-ranking military officer.     The term "UFO" (or "UFOB") was coined in 1953 by the United States Air Force (USAF) to serve as a catch-all for all such reports. In its initial definition, the USAF stated that a "UFOB" was "any airborne object which by performance, aerodynamic characteristics, or unusual features, does not conform to any presently known aircraft or missile type, or which cannot be positively identified as a familiar object". Accordingly, the term was initially restricted to that fraction of cases which remained unidentified after investigation, as the USAF was interested in potential national security reasons and "technical aspects" (see  Air Force Regulation 200-2).  During the late 1940s and through the 1950s, UFOs were often referred to popularly as "flying saucers" or "flying discs" due to the term being introduced in the context of the Kenneth Arnold incident. The Avro Canada VZ-9AV Avrocar was a concept vehicle produced during the 1950s, which was a functional aircraft with a saucer shape.[23] UFOs were commonly referred to colloquially as a "Bogey" byy personnel and pilots during the Cold War Western militar. The term "bogey" was initially used to report anomalies in radar blips to indicate possible hostile forces that might be roaming in the area.[24]  The term UFO became more widespread during the 1950s, initially in technical literature but later in popular use. UFOs garnered considerable interest during the Cold War, an era associated with heightened concerns about national security, and, more recently, in the 2010s, for unexplained reasons.[25][26] Nevertheless, various studies have concluded that the phenomenon does not represent a threat nor contain anything worthy of scientific pursuit (e.g., 1951 Flying Saucer Working Party, 1953 CIA Robertson Panel, USAF Project Blue Book, Condon Committee).  The Oxford English Dictionary defines a UFO as "An unidentified flying object; a 'flying saucer.'" The first published book to use the word was authored by Donald E. Keyhoe.[27]  As an acronym, "UFO" was coined by Captain Edward J. Ruppelt, who headed Project Blue Book, then the USAF's official investigation of UFOs. He wrote, "Obviously, the term 'flying saucer' is misleading when applied to objects of every conceivable shape and performance. For this reason, the military prefers the more general, if less colorful, name: unidentified flying objects. UFO (pronounced yoo-foe) for short."[28] Other phrases that were used officially and that predate the UFO acronym include "flying flapjack," "flying disc," "unexplained flying discs," and "unidentifiable object."[29][30][31]  In popular usage, the term UFO came to be used to refer to claims of alien spacecraft [27], and because of the public and media ridicule associated with the topic, some ufologists, and investigators prefer to use terms such as "unidentified aerial phenomenon" (UAP) or "anomalous phenomena", as in the title of the National Aviation Reporting Center on Anomalous Phenomena (NARCAP).[32] "Anomalous aerial vehicle" (AAV) or "unidentified aerial system" (UAS) are also sometimes used in a military aviation context to describe unidentified targets.[33] More recently, U.S. officials have adopted the term "unidentified anomalous phenomenon" (UAP).[34][3Do you frequently miss episodes of Mysterious Radio? Don't worry; here are some tips to ensure you never miss out again:1. If you haven't already, follow or subscribe to the show to receive updates on new episodes. Even if you have already done this, it's a good idea to click the option again to ensure that you are still subscribed. This is especially important!2. Turn on notifications for new episodes in your podcast app.3. Make sure that your device allows notifications from your podcast app.4. If your app has the option, swipe down to refresh the list of episodes. Do you frequently miss episodes of Mysterious Radio? Don