Will USA maintains its stand as the World Super Power?

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I think USA cannot maintain anymore. After 5 years, China will takeover as a World Super Power. With China's policy on low labor costs and millions or billions of workers of man-powers (army), She will soon be the most powerful country in the world. Remember, China invests almost 1/3 of its budget to military advancement and nuclear armament. Time will tell that China will soon challenge and dare any country to wage war at her. What do you think about America's current status as the world superpower?