Americans expressed mixed views on whether the atomic bombings of the Japanese cities of Hiroshima and Nagasaki were justified, a survey by a U.S. research group showed Monday, signaling a possible change in the country's prevailing view that the attacks were necessary to bring a quick end to World War II.The nationwide survey, conducted by Pew Research Center, revealed that 35 percent of American adults think using nuclear weapons in 1945 was justified, while 31 percent thought otherwise. A third said they are not sure.Days before the 80th anniversary of the bombings, the survey found that…READ FULL ARTICLE