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SCOTT SIMON, HOST:
This is WEEKEND EDITION from NPR News. I'm Scott Simon.
David Petraeus has resigned as director of the Central Intelligence Agency, citing an extramarital affair and saying that he showed, quote, "extremely poor judgment." It was a stunning fall for one of the most celebrated generals in recent U.S. history. NPR's Tom Bowman is here to talk about it. Tom, thanks so much for being with us.
TOM BOWMAN, BYLINE: You're welcome, Scott.
SIMON: What do we know now about what happened?