Former President Jimmy Carter, right, sits with his wife, Rosalynn, as they wait to pose for photos with guests at Maranatha Baptist Church, Sunday, Dec. 13, 2015, in Plains, Ga. A recent MRI showing no cancer on Jimmy Carter's brain is "very positive" news for the former president but will not end his medical treatment, doctors said. Carter, 91, announced last Sunday that doctors found no evidence of the four lesions discovered on his brain this summer and no signs of new cancer growth. (AP Photo/Branden Camp)