This Friday, Aug. 25, on NBC: Marking the one-year anniversary of Hurricane Katrina, "Dateline" will air an in-depth report documenting how the aftermath of Katrina affected the Lindy Boggs hospital staff and those patients trapped inside. Hoda Kotb interviewed the patients who were in the hospital, their family members and the heroic, and often resourceful, doctor and nurses who fought to save their lives.

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