One need only recall President Nixon's historic re-opening of relations with China to understand that such monumental matters cannot be rushed. Even before taking office in 1969, Nixon had expressed interest in normalizing decades of hostile relations with China for a variety of economic and security reasons, including the containment of a nuclear threat. It was not until 1979, over a decade later, that full diplomatic relations were established. In comparison, the current Iran nuclear negotiations did not begin in a direct, sustained way until just a couple of years ago. There is good reason that the P5+1, who otherwise disagree on many issues, have remained united on this one. Diplomacy is a marathon, not a sprint.