Siblings Fulfill Dying Wish by Competing in 'Race Across the World'

Margo Oakley and her brother-in-law Mark Blythen formed an unbreakable bond when their sister and wife, Julia, was terminally ill. Now, they're honoring her dying wish by competing in the intense reality TV competition, Race Across the World.

The two-person teams on the show must race from one end of the world to the other using only public transportation, with no access to modern technology or the support of loved ones. It's a grueling test of mental and physical endurance that pushes contestants to their limits.

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