By Eric Auner In August 1945, nuclear weapons were used in war for the first and last time. The Wall Street Journal reports that for the first time the U.S. is sending a representative to Japan's annual ceremony commemorating the bombing of Hiroshima. John Roos, the U.S. ambassador to Japan, will join representatives of 73 other countries, including Britain and France, for Friday's event marking the 65th anniversary of the Aug. 6, 1945, bombing. United Nations Secretary-General Ban Ki-moon will also attend. The annual Hiroshima peace memorial ceremony—where doves were released as a symbol for...