american and iranian president since 1979 underscores the deep mistrust between our countries, but it also indicates the prospect of moving beyond that difficult history. >> a historic moment, but actually president rowhani had broken that news himself right before president obama spoke when he fired off tweets about the conversation. to fully grasp how far the u.s. and iran have come, you have to understand just a little bit of where we've been. the relationship has had more drama than "argo." part of the story involves a handshake that did happen between the u.s. and iran, 1977 president carter met the shah of iran, who had been in power for two decades, thanks to a cia-backed coup. carter called the shah an island of stability. two years later the increasing autocratic leader was overthrown and replaced by the ayatollah khomeini, who declared the u.s. the great satan. that same year, 1979, militants stormed the u.s. embassy in