Tehran, Iran — Iran’s foreign minister said Saturday in an interview that an opportunity exists for nuclear negotiations with the West, but that it is “limited.” Abbas Araghchi’s comments come after the head of the U.N. nuclear watchdog, Rafael Grossi, visited the Islamic Republic for talks with high-ranking officials. “There is still an opportunity for diplomacy, although this opportunity is not much, it is a limited opportunity,” Araghchi said of Iran’s nuclear program in the interview with state television. The visit by the International Atomic Energy Agency (IAEA) director general is seen as one of the last chances for diplomacy