For the diplomatic corps, when is a face-to-face meeting required and when will a phone call suffice? I want to interview both diplomats and experts on diplomacy on the nuances of face-to-face meetings. Also, who travels to whom? When are neutral sites used? How much face-to-face time will be displaced by the ever-slicker Telepresence tools? This story for American Express' Executive Travel will explore the nitty-gritty of diplomatic travel