If you visit former President Jimmy Carter at his home in Plains, Georgia, you could be forgiven for thinking he's just an unassuming, retired gentleman keeping himself busy with hobbies like woodworking and oil painting. But as CBS News correspondent Rita Braver discovered, Carter's true passion is charitable work, from Habitat for Humanity's homebuilding to the Carter Center's efforts in 65 third-world countries. As Carter notes on the center’s website, “We can choose to alleviate suffering. We can choose to work together for peace. We can make these changes—and we must.”