A group of teenagers in Arkansas are donating their time and energy to change one man's life forever. They've built a wheelchair ramp for David Green because he couldn’t afford one. Green is an amputee who has had seven strokes. He had to be carried up and down the stairs to enter and exit his own home.

The volunteers work for the Ozark Mission Project and put in seven-hour days in triple-digit temperatures to build the ramp. And they didn't even have any carpentry experience before this!

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