Jimmy Carter was the first U.S. president to live to be 100 years old — a feat made even more incredible by the fact that he was alive for 40% of the nation’s history.

Lesser/Former U.S. President Jimmy Carter and his wife, Rosalynn, attach siding to the front of a Habitat for Humanity home in LaGrange, Georgia in 2003. For many, building homes for Habitat for Humanity is a once or twice in a lifetime experience.