Die Glocke (conspiracy theory) significant person Nick Cook
Die Glocke (German: [diː ˈɡlɔkə], "The Bell") was a purported top-secret scientific technological device, secret weapon, or Wunderwaffe developed in the 1940s in Nazi Germany. First described by Polish journalist and author Igor Witkowski. in Prawda o Wunderwaffe (2000), it was later popularized by military journalist and author Nick Cook, who associated it with Nazi occultism, antigravity, and free energy suppression research. Mainstream reviewers have criticized claims about Die Glocke as being pseudoscientific, recycled rumors, and a hoax. Die Glocke and other alleged Nazi "miracle weapons" have been dramatized in video games, television shows, and novels.History
In his 2001 book The Hunt for Zero Point, author Nick Cook identified claims about Die Glocke as having originated in the 2000 Polish book Prawda o Wunderwaffe ("The Truth About The Wonder Weapon") by Igor Witkowski. Cook described Witkowski's claims of a device called "The Bell" engineered by Nazi scientists that was "a glowing, rotating contraption" rumored to have "some kind of antigravitational effect", be a "time machine", or part of an "SS antigravity program" for a flying saucer.
According to Cook, Die Glocke was bell-shaped, about 12 feet (3.7 m) high and 9 feet (2.7 m) in diameter, and incorporated "two high-speed, counter-rotating cylinders filled with a purplish, liquid metallic-looking substance that was supposed to be highly radioactive, code-named 'Xerum 525.'" Cook recounts claims that "scientists and technicians who worked on the bell and who did not die of its effects were wiped out by the SS at the close of the war, and the device was moved to an unknown location". Cook proposed that SS official Hans Kammler later secretly traded this technology to the U.S. military in exchange for his freedom. Witkowski suggested that a concrete ring called "The Henge" near the Wenceslaus mine built in 1943 or 1944 and vaguely resembling Stonehenge was used to tether the Bell during tests. According to writer Jason Colavito, the structure is merely the remains of an ordinary industrial cooling tower.Witkowski's book was translated to English in 2003. He claimed to have discovered evidence of Die Glocke in a review of WWII-era documents that were declassified by the Polish government, which led him to additional research via archives and interviews. The first document, allegedly supplied to Witkowski by an unnamed Polish government official, was an affidavit from the war crimes trial for General Jakob Sporrenberg, who supposedly confessed to ordering the murder of about 60 persons who had knowledge of the secretive project. Kurt Debus, Wernher von Braun and Walther Gerlach  were also allegedly implicated in Die Glocke research. Witkowski claims Die Glocke was organized under a division of the Waffen-SS, and operated mainly at facilities in Lower Silesia. Die Glocke was conceived in early 1942, and active experimentation began in mid-1944. 
Prisoners from the Gross-Rosen concentration camp were supposedly exposed to radiation from Die Glocke, resulting in many deaths and health problems. Survivors of the camp are alleged to have reported witnessing tests of the Die Glocke, reporting a bright bluish light from the object.
Witkowski postulated Xerum 525 was likely an irradiated form of mercury used in the creation of a form of plasma that was intended as a weapon and/or propulsion system, and which may have been capable of distorting spacetime.