As Jimmy Carter celebrates his 97th birthday today, he sets the bar just a bit higher as the longest living president. Carter is also the oldest living president and the president who has lived longest after his term in office, but he has rarely ruminated about his longevity. Carter, the 39th president, has outlived George H.W. Bush by about two and a half years – something that seemed unlikely in 2015, when Carter announced that cancer had spread to his brain. His seemingly most important milestone arrived this past July, when he celebrated his 75th wedding anniversary with Rosalynn Carter, which made the Carters the longest-married presidential couple in history. Carter will quietly spend his 97th birthday on Friday at his home in southwest Georgia and doesn't plan on making any public appearances, according to Deanna Congelio, press secretary at the Carter Center in Atlanta. 📸: Robert Deutsch (@USATODAY), Bjoern Sigurdson, (@gettyimages), Charles Kelly (@apnews)