As the Mississippi River continues to rise through Iowa, Illinois and Missouri, federal officials fear many of the existing levees will fail, stressing the region's flood prevention system. A civil engineer discusses the science of levees.
Record rainfall and historic numbers of tornadoes have wreaked havoc on many parts of the Midwest, particularly in Iowa where a Boy Scout camp was decimated and flooding has caused thousands to evacuate. Kwame Holman reports on the widespread damage.
By PBS NewsHour
Rescue workers conducted emergency evacuations and rivers continued to swell Thursday after heavy rains soaked parts of the Midwest, leading to 13 weather-related deaths in the region.
The American Midwest, traditionally a base for manufacturing, has been hit hard by globalization in recent years. Economic correspondent Paul Solman reports on efforts aimed at strengthening the region's competitive edge.
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