ABC's Charles Gibson anchored World News from New Orleans Monday.

"We have come to the city of New Orleans tonight because one year ago at this very hour, this city was bracing for Hurricane Katrina," he said. "Bracing for what would become the costliest natural disaster in the history of the United States. An area along the Gulf Coast the size of Great Britain would be ravaged, and a great American city would be left underwater and essentially broken. It's still broken a year later. Many are determined it will be put back together, but there's very little direction on how that will be done or when."

> Earlier today: He reported from Charity Hospital...