The e-mail account was apparently Petraeus’s personal Gmail, not his official CIA e-mail, according to the Wall Street Journal. That’s still a big deal: Some of the most powerful foreign spy agencies in the world would love to have an opening, however small, into the personal e-mail account of the man who runs the United States’ spy service. The information could have proved of enormous value to foreign hackers, who already maintain a near-constant effort to access sensitive U.S. data. If Petraeus allowed his Gmail security to be compromised even slightly, by widening access, sharing passwords or logging in from multiple addresses, it would have brought foreign spy agencies that much closer to a treasure trove of information. As the Wall Street Journal hints, investigators were concer...