Nagasaki’s Peace Park held a ceremony today to mark the 79th anniversary of the dropping of the atomic bomb on the city (which killed 74,000 people). It was a sombre and moving occasion, as it always is, and one usually attended by high level representatives of all nations. This year was different though: the ambassadors of the UK, US and Israel were elsewhere, holding their own memorial at a Buddhist temple in Tokyo, 750 miles away.