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1 .This is Scientific American's 60-Second Tech. I'm Larry Greenemeier. Got a minute?
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2 .Roger Bannister broke the four-minute mile barrier in 1954 with help from a couple of pacers, runners he closely followed til his final sprint.
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3 .Sixty years later just about anyone could set a personal mile record, with help from a couple of jet engines strapped to their back.
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4 .The U.S.military wanted to find a way to help soldiers hoof it through hostile territory at high speeds without getting exhausted.
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5 .They turned to Arizona State University's Human Machine Integration Laboratory.
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6 .Engineers there came up with an 11-pound battery-powered backpack with two electric engines.
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7 .The engines spin at about 60,000 RPM, producing about 15 pounds of instantaneous thrust.
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8 .The researchers see the backpack as an alternative to outfitting soldiers with exoskeletons, which would have to be tailored to fit the individual soldier.
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9 .The same jet backpack could be worn by anyone with few adjustments.
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10 .The pack has yet to produce a sub four-minute miler, although one runner did trim 18 seconds off his best time.
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11 .Of course, that guy wasn't running through a desert wearing 50 pounds of gear.
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12 .Still, no one in a hurry would turn down a portable tailwind.
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13 .Thanks for the minute, for Scientific American's 60-Second Tech. I'm Larry Greenemeier.
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