OAK RIDGE - Eight peace activists were arrested Saturday after they refused to leave the entrance to the Y-12 nuclear weapons plant. They were demonstrating in remembrance of the civilians killed in the atomic bombing of Hiroshima, Japan, during World War II and protesting the continued production of nuclear bombs. Y-12 enriched the uranium used in the A-bomb dropped on Hiroshima, and the Oak Ridge plant now manufactures replacement parts for the U.S. arsenal of nuclear weapons. About 275 people participated in a Saturday rally at Oak Ridge's Bissell Park and a march to Y-12, where protesters chanted, pinned paper...