Pentagon UAP Task Force — Preliminary Assessment to Congress
The US Office of the Director of National Intelligence released a landmark Preliminary Assessment on UAP to Congress in June 2021. The classified report covered 144 incidents reported by US government sources, primarily military aviators. Of 144 reports, 143 could not be explained. Eighteen incidents showed 'unusual movement patterns or flight characteristics' including hypersonic speeds without propulsion signatures, no visible propulsion, and transmedium travel.