An unidentified aircraft is seen over Ridge, New York on December 12.Newsday LLC/Newsday via Getty ImagesDozens of unidentified aircraft have been spotted over cities in the eastern United States.Some of the suspected drones have been seen flying over military bases and airports.The FBI said Saturday it is still investigating but doesn't believe they pose a threat.Dozens of unidentified aircraft, at least some of which appear to be drones, have been spotted flying at night over New Jersey and other nearby states since mid-November, sparking concern from local officials and speculation among citizens.Officials from the Federal Bureau of Investigation and the Department of Homeland Security told reporters on Saturday that they were still investigating but had no evidence the aircraft pose a threat to the public or are connected to a foreign adversary."But ...