A secretive Pentagon UFO data retrieval program has been hidden from Congressional oversight since 2017, a new report claims. Whistleblowers assert the program codenamed 'Immaculate Constellation' " was established to 'detect' and 'quarantine' the military's best UFO imagery, as well as its best videos, eyewitness testimonies and electronic sensor evidence. This trove of high quality, multi-sensor UFO data is so tightly held that 'talking about it will put you in the danger zone,' according to a US official who confirmed the leak. The quite literally 'above top secret' program allegedly sprang into action in the wake of the 2017 leak of three, still-as-yet unexplained US Navy infrared UFO videos. The source of the leaked report, who supplied the document to the independent news site Public, described the program as an 'Unacknowledged Special Access Program' or USAP with unique secrecy privileges. 'The multitude of wavelengths collected by these sensors ... have captured UAP characteristics that are difficult or impossible to observe with the human eye alone,' according to the leaked report, allegedly intended for cleared members of Congress. 'Subtle atmospheric effects associated with UAPs are also visible through the sensors,' the leaked report added. 'Some of the phenomena we may be seeing,' ex-CIA head John Brennan [said], 'results from something that we don't yet understand and ... some might say constitutes a different form of life.'