Sources tell DailyMail.com a classified report due to be sent to Congress this week lists more than 150 cases of unexplained UFO encounters in the past year The 22-page report was compiled by the Office of the Director of National Intelligence (ODNI) and analyzes 366 cases Only about half of the UFO encounters could be explained Examples include video shot by Reaper drones conducting surveillance that caught 'orbs' flying around then 'suddenly bolting off' Among the explained cases are 'brand new surveillance by foreign adversaries,' including Chinese spy drones attempting to gather information on the US The ODNI source was...