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APPENDIX I In the following section of this report, each remaining unexplained incident is considered separately. It is not the intent to generally discredit the character of observers, but each case has undesirable elements, and these cannot be disregarded. The numerical designation is merely the categorical order of the.dncident in the project files. Incident No. 1 — & July 191:7, 0930 hours local, Muroc Air Force Base. Four witnesses, all obs Nae two ely dise like or spherical objects arainst a clear bright sky. All witnesses estimated the altitude at about c000 feet, and the speed between 300 and 00 MPH. It is possible to estimate distance and speed of anobject with a fair degree of accuracy if the size is known. The distance is judged on the kmowm size and speed on an estimate of distance, plus angular change in position (see page 8, app. G). In this incident the size could not be known, owing to the fact that the object was not identified. The time in sight and angular distance traveled were not given. However, the first witness stated he sighted the objects at 0950, and tne last witness said he was called to view the objects at 1000. Time in sight is therefore assumed to be at least one-half hour, The objects reportedly traveled in a straight line. Taking the mean reported speed (550 MHI), the objects must then have traveled 175 MPH while in sight. If the objects were of such proportions as to be seen at that distance, it is believed that more details could have been observed at the first sighting. Two additional remarkable aspects of this case are $ le A few manents previous to the sighting, the first witness was engaged in conversation. Quoting the aint "My part in this conversation was as follows: ‘Someone will ha to show me one of those dises before I will believe it.'" 2. The statements of the three other witnesses were sade to the first witness. All ieee agree almost identically with the first. It is probable, therefore, that their evidence was influenced by suggestion. AMC Opinion: This report is a result of misinterpretation of the nature of real stimuli, probably research balloons. Declassification Authority: NND 57565