year-old college student when the bomb dropped on Hiroshima in 1945. Speaking through an interpreter, he spoke of the physical and mental anguish he experienced. «That's why we call the atomic bomb the absolute evil,» he said. A monthlong review of the nonproliferation treaty at the UN begins Monday _ a process that is done every five years. The treaty calls for nations without nuclear weapons to pledge not to pursue them, and the five that acknowledge having nuclear weapons _ the United States, Russia, Britain, France and China _ to pledge to move toward eliminating them. But there are concerns about the treaty's effectiveness and contentious issues have sprung up even before the review, from North Korea's withdrawal from the treaty to the threat of nuclear terrorism. Protesters on Sunday didn't limit their concerns to nuclear weapons.