Carter "At Peace," But What Lies Ahead In Treatment?

Former President Jimmy Carter is undergoing treatment for cancer. Carter, who will be 91 Oct. 1, said doctors found four melanoma spots on his brain after removing the cancer from his liver. The former president said is he "perfectly at ease with whatever comes." For more on President Carter's diagnosis, we spoke to Dr. Todd Doyle, a radiation oncologist with New York Oncology-Hematology, who says melanoma is not limited to the skin, as many people may believe.