The pre-cast concrete roof at the Greenbrier Inn in Branson, Mo., stayed intact even after strong winds tore away a portion of the waterproofing material on top. Local officials thought the roof had collapsed, but they found out that only the roofing material on top of the structure had been ripped off. "It's a pre-cast concrete roof with some roofing material on top for waterproofing," said Ted Martin, Chief of the Branson Fire Department.

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