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Rio Olympic Security Will be Monitored From Above

When this year’s Rio Olympics begin next week, more than 130,000 police, soldiers and security guards will be working to keep the Games safe, with the help of eye-in-the-sky monitors using cutting-edge, high-tech cameras. Developed for the U.S. military and tested in Iraq and Afghanistan, a high-resolution imaging system called Simera will provide real-time video surveillance of an area of about 40 square kilometers. From balloons anchored 200 meters above the ground, 13...

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