Sen. John McCain was admitted Wednesday to Walter Reed Hospital for "normal side effects" of his cancer treatments, his office said in a statement. "As ever, he remains grateful to his physicians for their excellent care, and his friends and supporters for their encouragement and good wishes," the statement said. McCain is currently receiving treatment for glioblastoma, an aggressive form of brain cancer. The 80-year-old was diagnosed in July. In an interview with Lesley Stahl for "60 Minutes" in September, McCain spoke about facing the tough diagnosis. "They said that the prognosis is very, very serious. Some say 3 percent,...