Imgur user bcisaidiwould recently shared the story of two sisters, Sam and Alex Kimura, who are traveling across the country. They're looking for a bone marrow match for Sam, who has severe aplastic anemia—a potentially life threatening blood disorder. The best chance of a cure is a bone marrow transplant, but no one in her family matches, nor does anyone currently on the National Bone Marrow Registry.

Not sure who is who...
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The younger you are when you get your transplant, the better your chance of survival. Sam's been waiting for years, and apparently she and Alex got fed up with it and took to the road. They sold their cars and bought a van (presumably in honor of the Scooby Gang):

Jeepers!

They've been traveling since January and have vowed to explore every state. They also have a map that looks like it should be in a movie about them:

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Sources: bcisaidiwould