1947-08 · Sandia Base, Albuquerque, New Mexico · US
Sourcing status: Sourced and not flagged as disputed (see Sources section below for the 2 citations this entry is based on).
A cluster of reports by AEC security personnel and base officers at Sandia Base in the weeks following Kenneth Arnold's June sighting. Project Sign and later Project Blue Book retained the case files; the AEC's own teletype traffic on the cluster is held at the National Archives.
Sources
primary_doc: Project Sign / Blue Book case files (NARA RG 341)
book: Ruppelt, Edward J. The Report on Unidentified Flying Objects (1956)