Lt. General Nathan Twining wrote a report, entitled "Air Accident Report on 'Flying Disc' Aircraft Stored at White Sands Proving Ground, New Mexico", that was dated 16 July, 1947.  It contained his findings resulting from an investigation into the crash of a UFO near Roswell, New Mexico on the 4th of July, 1947.  The data furnished in this report was provided by his Air Material Command engineering staff and scientific personnel from the Jet Propulsion Laboratory, CIT, and the Army Air Forces Scientific Advisory Group.         This report states 'It is the collective view of this investigative body, that the aircraft recovered by the Army and Air Force units near Victoric Peak and Socorro, New Mexico, are not of U.S. manufacture for the following reasons: The circular, disc-shaped "planform" design does not resemble any design currently under development by this command nor of any Navy project.  The lack of any external propulsion system, power plant, intake, or exhaust, either for propeller or jet propulsion, warrants this view.         "The inability of the German scientists from Fort Bliss and White Sands Proving Ground to make a positive identification of a secret German V weapon out of these discs.  Though the possibility that the Russians have managed to develop such a craft, remains.  The lack of any markings, ID members, or instructions in Cyrillic, has placed serious doubt in the minds of many, that the objects recovered are not of Russian manufacture either."              There is a flight deck located inside the copula section.  It is round and domed at the top.  The absence of a canopy, observation windows/blisters, or any optical projection lends support to the opinion that this craft is either guided by remote viewing or is remotely controlled.  A semi-circular photo-tube array (possibly television) was present.  Crew compartments were hermetically sealed via a solidification process with no weld marks, rivets, or soldered joints.  Craft components appear to be molded and pressed into a perfect fit."   Another report was written on the subject, "Mission Assessment of Recovered Lenticular Aerodyne".  In Part II of that report, entitled "Technical Evaluation (Preliminary)", it states, "Upon close examination of the exterior surfaces of the craft's fuselage, metallurgists found the skin to be of a ferrous metal white in color.  The metal exhibits all the characteristics of high-grade steel.  It was determined that the steel was cold-formed and heat-treated.  Tensile strength was estimated in excess of 150,000 pounds per square inch.  Shear tests give the metal a durability ratint above 175,000 pounds per square inch, making this fuselage extremely strong and heat resistant.   Static and pressure flow simulations were impressive.  The low profile ratio of 6-to-1 gives the aerodyne a great advantage in overcoming the restrictions of the boundry layer effect in high performance operations.  Spar flanges are constructed in unusual kinematic... is believed to allow strain relief at supersonic speeds.  There were no visible signs of plate-differences.  There were no fasteners, weld, rivets, or fittings, holding the fuselage together.   The lack of wings, flaps, stabilizers, and surface control features, suggests that the craft is a lifting body.  There are no air intakes or exhaust.  There are no cables.  There are no identifiable electronic (wiring, ignition, lights, instrument, compartment, engine, motors, vacuum tubes, solenoids, generators, heaters, etc.)  Navigation and engine controls may be activated by tactle manipulation.  Viewing may have been achieved by the form of television imagery.  Symbolic notation appears to be in the form of flight and control indicators.  Flat panels of unknown metal has been suggested as a device associated with the operation of the aerodyne was discovered and analyzed.  Its mode of operation and purpose is unknown.   Mode of operation is believed to be instrumentation and suggests that the aerodyne, from reconstruction of available wreckage [may be accomplished with] biosensory and optical stimuli for these reasons: Absence of indicator lights, absence of any circular dials, absence of liniar dials or moving pointers, absence of counters or scopes, and no mechanical signal indicators.   There were no identifiable control types found among the assortment of artifacts that would indicate any operation of the propulsion unit with manually activation knobs, push-buttons, toggle switches, levers, balls, handwheels, handcranks, or foot-pedals were observed in interior space of the flight cabin.