http://www.helium.com/knowledge/241572-how-omaha-ne-protects-itself-from-tornadoes.xml Helium.com > Omaha > How Omaha, NE protects itself from tornadoes en-us Copyright Helium.com Thu, 13 Aug 2009 12:59:24 GMT Thu, 13 Aug 2009 12:59:24 GMT