Tyler Armstrong, 9, Conquers Mt. Aconcagua

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Another mountain, another record shattered by 9-year-old Tyler Armstrong.

On Christmas Eve, the Yorba Linda boy reached the summit of Argentina’s Mt. Aconcagua — the tallest mountain in the Western and Southern hemispheres.

Learn more about Tyler at his website, TopWithTyler.com, and about Duchenne muscular dystrophy at CureDuchenne.org.