The funny thing is, Paula Broadwell and David Petraeus thought they knew what they were doing. They were careful, more careful than the average American fooling around outside the bounds of marriage tends to be. When Broadwell wanted to warn off the other woman she suspected of messing with her man, she set up an anonymous email account and only used it away from home, usually on the Wi-Fi networks of hotels she was staying in. Broadwell and Petraeus also thought they could avoid having their emails intercepted in transit by technically avoiding “sending” them at all. Instead, they saved their messages to each other as “drafts” in a Gmail account to which they both enjoyed access.