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WASHINGTON (WUSA9) -- A small band of grandparents from North Carolina are walking 100 miles to bring focus to the crisis of climate change.

The "2013 Walk for Our Grandchildren" began near Camp David and will end at the White House.

The purpose of the walk is to urge President Barack Obama to stop the Keystone XL Pipeline.

The grandparents began their walk on Friday, July 19 and are expected to reach the White House for a rally by July 27.

Steve Norris, grandparent and professor at Warren Wilson College, and his wife, Kendall Hale, will lead the group to Harpers Ferry and down the C&O Canal to D.C.

They will be joined by other grandparents, parents and some grandchildren. By the time they reach the White House, hundreds are expected to participate.

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