In light of these documented facts, the hundreds of anecdotal accounts were reduced to a few. Eliminated were accounts that were likely descriptions of materials known to be part of the Project MOGUL balloon train and accounts describing transportation of these materials. From the remaining testimony, Air Force researchers developed the following set of working hypotheses to assist in identifying the actual events, if any, matching those described by the witnesses. _a._ Due to the number and great detail provided in some of the accounts, it was likely that some event(s) actually did occur. _b._ Due to the many similarities of the two crash site descriptions and the considerable distance between them, it was likely that more than one event with similar characteristics was the basis for these accounts. _c._ Since the account of bodies at the Roswell Army Air Field hospital did not contain elements similar to reports of the two crash sites, it was likely that this account was unrelated to the crash site accounts. (The hospital account will be addressed separately in Section Two of this report.) The remaining testimony was examined with regard both to the facts and to working hypotheses to determine if there were common threads or links connecting any of the accounts. If similarities were found, the next step was to determine if they were related to an actual event. Finally, if there were actual event(s), were they part of U.S. Air Force or U.S. Government activities? Common Threads Careful examination of the testimony revealed that primary witnesses of the two “crashed saucer” locations contained descriptions common to both. These areas of commonality contained both general and detailed characteristics. However, before continuing, the accounts were carefully examined to determine if the testimony related by individual witnesses were of their own experiences and not a recitation of information given by other persons. While many aspects of the remaining accounts were judged to be similar, other aspects were found to be significantly different. The accounts on which the analysis is based were determined, in all likelihood, to have been independently obtained or observed by the witnesses.