" "It is impossible not to have thoughts about it," Kerry said, adding that he had watched the ceremony in Hiroshima's peace park marking the moment of the atomic blast in 1945. "Needless to say, it is a very, very powerful reminder of not just the impact of war lasting today on people and countries, but it also underscores the importance of the agreement we have reached with Iran to reduce the possibility of more nuclear weapons," he told reporters."