From UFO to UAP: The Evolution of Official Anomalous Phenomena Inquiry
To the point
Unidentified Anomalous Phenomena (UAP) is the official term for unusual events across air, water, and space, replacing UFO, and the U.S. government now investigates them through AATIP and AARO with mandatory congressional reporting, using Hynek’s CE1–CE5 categories and five observable traits to determine what they are and where they come from.