As participants in the Avon Walk for Breast Cancer wound their way through Chicago this week, oncologists and cancer researchers met close by at the 2012 annual meeting of the American Society for Clinical Oncology to discuss the latest research in the field. At the meeting's opening session, American Cancer Society CEO John Seffrin said, "We are at an unprecedented place in our understanding" of cancer, and added that cancer death rates are dropping, and doctors must take the opportunity to keep this trend going by teaching their patients everything they know about preventing cancer.