The International Atomic Energy Agency on Sunday urged Iran to resume talks “now” to avoid a crisis that could make it “extremely more difficult” to salvage the 2015 nuclear accord. Iran this week disconnected some cameras allowing international inspectors to monitor its nuclear activities in response to a Western resolution passed June 8 in which the UN agency denounced Tehran’s lack of cooperation. Twenty-seven surveillance cameras “have been removed,” IAEA Director General Rafael Grossi said in an interview broadcast Sunday by CNN, calling it a “very serious move.” “Recent history tells us …