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The Inside Story: Teen travels the world to set marathon record

Last Updated Apr 30, 2015 at 12:15 pm EST

Avery Haines introduces us to a remarkable mom and daughter duo that are running seven marathons in seven continents over just three months.

Kristen De Sousa, 15, is running on behalf of Children of the Mountain, an organization dedicated to supporting the education of children in the poorest areas of Nepal. You can donate here: http://www.justgiving.com/kristen-De-Sousa