At the age of 90, former President Jimmy Carter announced today that cancer has been found on his brain. He addressed reporters at a news conference in Atlanta where he planned to begin radiation treatment. "I was surprisingly at ease. I've had a wonderful life, thousands of friends, and I've had an exciting, adventurous, gratifying existence."
Richard Reeves is a presidential historian. He's a senior lecturer at the USC Annenberg School for Communication and Journalism in Los Angeles.