A new bombshell document has revealed 21 unexplained UFO sightings - sparking warnings for experts. The US government confirmed the shock findings after congress received the document from the All-domain Anomaly Resolution Office (AARO), with the new paper detailing eyewitness accounts that had been investigated. Claims of Unidentified Anomalous Phenomena ( UAP ), also known as UFOs, ranged from a green fireball and a flashing. Other concerns which were flagged included multicoloured jellyfish