#AATIP

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• USS Princeton USS Princeton (CG-59) is a Ticonderoga-class guided-missile cruiser whose SPY-1B radar system tracked unidentified aerial objects during November 2004 training exercises off the California coast, producing the sensor data that corroborated the visual accounts of F/A-18 pilots in the Nimitz UAP encounter - the most technically documented unidentified aerial phenomenon case in U.S. military history.