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The Hubert H. Humphrey Metrodome in Minneapolis is the home of the Minnesota Vikings football team. It had an inflatable roof, but under the weight of eighteen inches of snow, it collapsed early this morning. Thankfully, no one was injured.
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They complain all the time that they need a new stadium (at the tax payer's expense, of course). Just rip off the roof, and you've got an outdoor stadium. Bada-boom, bada-bing.