The Twining Memo
General Nathan Twining, author of the September 23, 1947 memo. He later earned a fourth star and became USAF Chief of Staff — and then Chairman of the Joint Chiefs of Staff.
For good reason, this is one of the most important UFO documents we have. On September 23, 1947, right at the beginning of the “modern” UFO era, General Nathan Twining, Head of the U.S. Air Material Command (AMC), wrote a classified letter to Air Force General George Schulgen regarding the “flying discs.” He said the objects were “real and not visionary or fictitious.” They may possibly be natural phenomena, he wrote, such as meteors. But:“the reported operating characteristics such as extreme rates of climb, maneuverability (particularly in roll), and action which must be considered evasive when sighted … lend belief to the possibility that some of the objects are controlled either manually, automatically, or remotely.”
Twining listed several common descriptions of UFOs:
-they generally were silent,
-had a metallic or light reflecting surface,
-no trail,
-were circular or elliptical in shape,
-often flat on the bottom,
-some indicated a dome on top,
-several reports indicated they flew in formation,
AMC Opinion Concerning "Flying Discs"
Brig. General George Schulgen
AC/AS-2
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As requested by AC/AS-2 there is presented below the considered opinion of this command concerning the so-called "Flying Discs." This opinion is based on interrogation report data furnished by AC/AS-2 and preliminary studies by personnel of T-2 and Aircraft Laboratory, Engineering Division T-3. This opinion was arrived at in a conference between personnel from the Air Institute of Technology, Intelligence T-2, Office, Chief of Engineering Division, and the Aircraft, Power Plant and Propeller Laboratories of Engineering Division T-3.
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It is the opinion that:
a. The phenomenon is something real and not visionary or fictitious.
b. There are objects probably approximating the shape of a disc, of such appreciable size as to appear to be as large as man-made aircraft.
c. There is a possibility that some of the incidents may be caused by natural phenomena, such as meteors.
d. The reported operating characteristics such as extreme rates of climb, maneuverability (particularly in roll), and motion which must be considered evasive when sighted or contacted by friendly aircraft and radar, lend belief to the possibility that some of the objects are controlled either manually, automatically or remotely.
https://www.roswellfiles.com/FOIA/twining.htm