The Pentagon's classified "black" budget is bigger than it was during the Cold War, but the battlefield has changed completely. Popular Science reveals the secrets of America's 21st-century arsenal. By Sharon Weinberger
The Pentagon has put a $1-trillion price tag on Afghanistan's mineral wealth, but finding and extracting the riches won't be easy. By Matthieu Aikins
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In 2020, you could be flying space planes, reading minds, or curing disease in the womb. Start building the perfect résumé now. By Ben Paynter
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