Attacks like the one by U.S. and Israel on Iran’s Bushehr nuclear site must never happen again, and the world needs to discuss avoiding a moment where nuclear weapons, even in a limited way, would be used, says Director-General of International Atomic Energy Agency Rafael Grossi, welcoming news of the U.S.-Iran ceasefire. In an exclusive interview to The Hindu, Mr. Grossi, who is running for UN Secretary General this year, says UNSC reform is possible, and that India has a “legitimate” claim to a seat.