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- These $20,000 bulletproof shelters for classrooms can withstand shooters and Category 5 hurricanes
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- 6 years, 11 months ago
- China’s 9.4-ton space station is about to fall from the sky — and no one is sure where its debris will land
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- 6 years, 11 months ago
- See A Smart Helmet With Wireless Device That Give Signals For Better Safety
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- 6 years, 11 months ago
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