They may not come in peace, after all.
Over the decades, dozens of UFOs have been witnessed around nuclear weapons sites.
Former Pentagon investigator Luis Elizondo said earlier this year the encounters could be reconnaissance missions for a potential invasion.
But in his new book, researcher Robert L Hastings, who has devoted decades to interviewing dozens of U.S. military personnel who have seen UFOs near nuclear sites, believes the reality may be more complex.
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