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Nanotechnology has surprising applications in mundane materials like sunscreen and esoteric items like high-tech body armor for soldiers. But some fear scarier scenarios worthy of a science fiction novel.

At Florida State University, engineers are creating new body armor for American troops. It's more durable, more bulletproof and light enough that it can cover arms and legs as well as torsos.

``It's definitely more flexible and more comfortable,'' says Frank Allen, operations director for FSU's High Performance Materials Institute.

Nanotechnology: sci-fi fears vs. a world of innovation