Family, friends and baseball: How Jimmy Carter is celebrating his 98th birthday

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Jimmy Carter, already the longest-living U.S. president in history, will celebrate his 98th birthday Saturday with family and friends in Plains, the tiny Georgia town where he and his wife, 95-year-old Rosalynn, were born in the years between World War I and the Great Depression.

The 39th president’s latest milestone comes as The Carter Center, which the Carters established together after their one White House term, marks 40 years of promoting democracy and conflict resolution, monitoring elections, and advancing public health in the developing world.