This memorandum summarizes the All-domain Anomaly Resolution Office’s (AARO) ongoing analysis of a reported incident near a sensitive national security site in the western United States involving unidentified anomalous phenomena (UAP) over a period of two days in 2023. As of June 2026, the case remains unresolved.

This image is a notional representation of four incidents reportedly involving unidentified anomalous phenomena in the western United States, as seen from above. This illustration depicts multiple incidents reported by U.S. federal law enforcement special agents over a period of several days in October 2023.

This memorandum presents the first-hand narrative from Witness 1 provided to the All-domain Anomaly Resolution Office (AARO). Witness 1 was one of several United States (U.S.) federal law enforcement special agents who reported observing unidentified anomalous phenomena (UAP) over a period of two days in October 2023 in the western United States.

This memorandum presents the first-hand narrative from Witness 2 provided to the All-domain Anomaly Resolution Office (AARO). Witness 2 was one of several United States (U.S.) federal law enforcement special agents who reported observing unidentified anomalous phenomena (UAP) over a period of two days in October 2023 in the western United States.

This memorandum presents the first-hand narrative from Witness 3 provided to the All-domain Anomaly Resolution Office (AARO). Witness 3 was one of several United States (U.S.) federal law enforcement special agents who reported observing unidentified anomalous phenomena (UAP) over a period of two days in October 2023 in the western United States.

This memorandum presents the first-hand narrative from Witness 4 provided to the All-domain Anomaly Resolution Office (AARO). Witness 4 was one of several United States (U.S.) federal law enforcement special agents who reported observing unidentified anomalous phenomena (UAP) over a period of two days in October 2023 in the western United States.

This memorandum presents the first-hand narrative from Witness 5 provided to the All-domain Anomaly Resolution Office (AARO). Witness 5 was one of several United States (U.S.) federal law enforcement special agents who reported observing unidentified anomalous phenomena (UAP) over a period of two days in October 2023 in the western United States.