(NewsNation) — Former President Carter, who died Sunday at age 100, left behind a unique legacy of openness about UFO sightings, including his own encounter in 1969, and a message to potential alien civilizations that continue to travel through space.

As a rising politician in Georgia, Carter reported seeing an unidentified flying object outside a Lions Club in Leary, Georgia. He described a bright orb that changed colors from blue to red to white, moving toward and away from........

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