Today on CNN 10, we learn how the FDA's approval of a diagnostic test could help slow the progression of Alzheimer's disease. We'll also find out how one man used a drone to help rescue a swimmer in rough waters. And we'll see how skateboarding is lifting the spirits of a group of kids in Gaza, before checking out a student program that's using 3D printing technology to provide prosthetic limbs to people thousands of miles away. All this and more on today's CNN 10!

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