Zweites Deutsches Ferhnsehn (ZDF), Germany’s public television station, broadcasts an investigation into alternative accounts of 9/11 called “Mythos und Warheit: Der 11. September 2001.” The documentary concludes there was no government conspiracy behind the attacks but describes what producer Michael Renz calls a “wall of silence” when he approached officials for information. “When officials are asked about 9/11 conspiracy theories they react by barricading themselves. For example: one of the greatest mysteries about the attacks on America is the apparently empty crater in Shanksville, Pennsylvania. Where is the wreckage of Flight United 93? After asking United Airlines, we are told that the insurance company has the wreckage. But the responsible manager at that company is first in a meeting, then on a three-day business trip, which then becomes a several weeks-long intercontinental trip. During this time he cannot be reached by email or cell-phone—or so we are told by the secretary of one of the largest airline-insurance companies in the United States. After weeks and countless phone calls finally a brief answer: we do not have the wreckage. The FBI in Washington is in charge. The FBI press officer is surprisingly open and cooperative. There will be no interview about 9/11 but he will certainly give permission to film the wreckage. After all, the investigations have ended and there is no reason to exclude the public. Alas! The FBI no longer has the wreckage. It has been returned to United Airlines. Back to square one! Yes, we have the wreckage, says the airline after a new inquiry. But no permission to film. No reason given. All inquiries to government officials, and most to private companies, end this way. Apparently no one wants to have anything to do with 9/11.” The producer describes similar difficulties when he tried to obtain permission to film inside a Boeing flight simulator or when he approached New York officials to ask them about the fireproofing in the WTC. “But when we talk with officials off-the-record, many say a gag-order has been handed from the top. There is widespread fear of getting into trouble by talking.” [Hamburger Abendblatt, 9/11/2007; Renz, 9/11/2007]