CIA Director Resigns, Was Having An Affair

I read a lot of thrillers and spy novels, and the headline on this post sounds like the basis for a good one. In truth I'm not making it up. There's a "breaking news" headline at msnbc.com, saying that David Petraeus has submitted a letter of resignation due to an affair. First thought: With the security that surrounds a CIA Director, how on earth could anyone sneak away for a tryst with a woman he's not married to? I haven't read any of the details yet, but this is bound to be juicy.