VIENNA — On the eve of the opening round of negotiations to get a comprehensive nuclear deal with Iran, a US diplomat said the process would be "complicated, difficult and lengthy," but that it represented "the best chance" the world has had in a decade to resolve concerns about Iran's nuclear program.
"These next days will be the beginning of what will be a complicated, difficult and lengthy process," the senior US Administration official, speaking not for attribution, told journalists here Monday night. "When the stakes are this high, the devil truly is in the details. It can't be done in a day, a week, or a month."
