WASHINGTON — The head of the U.N.’s nuclear watchdog says his monitoring program in Iran is no longer “intact” after Tehran refused requests to repair cameras at a key facility, creating the possibility the world will never be “able to reconstruct the picture” of what the Iranians have been doing. In an interview with NBC News, International Atomic Energy Agency Director-General Rafael Mariano Grossi says he’s been unable to establish the type of direct communication with Iran’s government that he had before a new hardline government run by President Ebrahim Raisi was elected in June.