City leaders in Moore, Okla., have approved new residential building codes requiring new homes to be built to withstand winds of up to 135 mph. Officials say Moore is believed to be the first U.S. city to adopt building codes aimed at making homes more resistant to damage caused by tornadoes. The building standard now used requires homes to withstand winds of up to 90 mph. Moore was hit by a devastating E5 tornado last year.
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