When the Petraeus news hit, congressional leaders bemoaned not being notified beforehand. Gwen Ifill talks to Jane Harman, former ranking Democrat on the House Intelligence Committee, and former Justice Department official Matthew Miller about when and if Congress and the president should be briefed on such investigations. But people in the Allen camp in Washington and people who represent Kelley -- she's hired a lawyer and a P.R. representative -- both people say that there was no inappropriate relationship. There was no affair. It was a platonic friendship. It's so interesting because this scandal that is rocking Washington and has led to the downfall of Petraeus and is raising questions about John Allen all started with this Tampa party social scene in which Jill Kelley was the key player. JEFFREY BROWN: What do we know about Jill Kelley at this point? SARI HORWITZ: Well, here's what we know. She was an ad hoc kind of social ambassador with the military and their wives, the generals based in Tampa. She was a volunteer at the MacDill Air Force base, which is located next to her mansion. She and her husband, Scott, who is a surgeon in Tampa, threw these lavish parties with the military, cigars and champagne and string quartets. And they were friends. They socialized. And she obviously liked to send e-mails. She sent many, many e-mails to General Allen. We have heard 20,000 to 30,000 pages of documents. Those aren't all e-mails, but many of them are e-mails. JEFFREY