"As the only nuclear power to have used a nuclear weapon, the United States has a moral responsibility to act." These words, spoken by President Barack Obama in Prague in 2009, helped guide his efforts to reduce the importance of the role nuclear weapons play in global affairs.But they also made possible his historic visit to Hiroshima. For all of the progress that President Obama made in addressing the danger posed by nuclear weapons, it was his visit to Hiroshima that, in many ways, was the most courageous step, because it showed again that people can make history by doing things others c…READ FULL ARTICLE