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The scattered ruins of Moore, Oklahoma - a town devastated for the third time in 14 years by a tornado (a violent wind accompanied by a funnel-shaped cloud) are a grim reminder that in America’s so-called "tornado alley," current building codes can’t do much to prevent property destruction and loss of life, especially when a powerful twister cuts through town. But, as VOA’s Rosanne Skirble reports, the death toll can be dramatically reduced when people take shelter in underground bunkers and hardened safe-rooms.