Propaganda first, facts later

From a correction to a Washington Post article:

Earlier versions of this story, including in the print edition of The Washington Post, wrongly described the 1979 Three Mile Island accident as "deadly." Although the accident was the most serious in U.S. commercial nuclear power plant operating history, it did not cause any deaths or serious injuries.

All those fact-checkers and "layers of editors," and no one caught this before it got into print?

Hat tip: BotW.