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              Tesla's writings have many references to the use of his wireless power 
                transmission technology as a directed energy weapon. These references 
                are examined in their relationship to the Tunguska explosion of 
                1908 which may have been a test firing of Tesla's energy weapon. 
                
                
              This article 
                was first published in a different form in 1990. The idea of a 
                Tesla directed energy weapon causing the Tunguska explosion was 
                incorporated in a fictional biography (1994), by another writer, 
                and was the subject of a Sightings television program segment. 
                 
                 
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               The French 
                ship Iena 
                blew up in 1907. Electrical experts were sought by the press for 
                an explanation. Many thought the explosion was caused by an electrical 
                spark and the discussion was about the origin of the ignition. 
                Lee De Forest, inventor of the Audion vacuum tube adopted by many 
                radio broadcasters, pointed out that Nikola Tesla had experimented 
                with a "dirigible torpedo" capable of delivering such 
                destructive power to a ship through remote control. He noted, 
                though, Tesla also claimed that the same technology used for remotely 
                controlling vehicles also could project an electrical 
                
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              wave of 
                "sufficient intensity to cause a spark in a ship's magazine 
                and explode it." (1)
                
              In the summer of 1913, Signor Giulio Ulivi, blew up a gas meter with 
                his "F-Ray" device and destroyed his laboratory. Then, 
                in August of that year, exploded three mines in the port of Trouville 
                for a number of high ranking French naval officers. The following 
                November, he travelled to Splezzia, Italy to repeat the experiments 
                on several old ships and torpedo boats for that country's navy.(2) 
                
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