Katrina Five Years After: Hurricane Left a Legacy of Health Concerns

Fox News -- Five years ago, Hurricane Katrina devastated the Gulf region, killing nearly 2,000 and displacing more than 250,000 others from Louisiana to Florida. This week, in a series titled "Hurricane Katrina: Five Years After," FoxNews.com looks back on the costliest natural disaster ever to strike the United States.

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A team of researchers led by Dr. George Cobb from Texas Tech University sampled 128 sites throughout New Orleans and combined their findings with data gathered by the U.S. Army Corps of Engineers.

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