Britton Keeshan
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Britton Keeshan, a graduate of Phillips Academy and Middlebury College, is the youngest person to climb the tallest mountains on all seven continents (the Seven Summits). He accomplished this feat in May of 2004, when he successfully summited Mount Everest.
Keeshan is the grandson of Bob Keeshan, the children's performer better known as Captain Kangaroo. He had a close relationship with his grandfather and he buried a photo of the two of them at the summit of Mount Everest.