Some devices "haven't been as safe as they should be, " says David Waters, a cardiologist at the University of California, San Francisco.

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In 1995 an employee and confidante, David Waters, who had hidden his criminal record from O'Hair, kidnapped the ailing 77-year-old, her son Jon and granddaughter Robin.

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Luckily, says WWOZ general manager David Freedman, the flood waters stopped right at the facility's loading dock.

NPR: Library of Congress: Saving New Orleans Music