Iranian Foreign Minister Javad Zarif said on Sunday that now is the time, and perhaps the last chance, for six world powers to seal a final nuclear deal with his government. But Western officials said progress in talks remains slow, and Tehran is resisting their key demand for a significant reduction in Iran’s enrichment activities. Mr. Zarif met twice with U.S. Secretary of State John Kerry this weekend on the sidelines of the Munich Security Conference. He also held talks on Saturday with other foreign ministers from the six-power group with which Tehran negotiates over its nuclear program. Mr. Zarif said that while it wouldn’t be the end of the world if a nuclear deal proved elusive, a final […]