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HENDERSON (AP) — Florida Sen. Marco Rubio says he is indebted to America and running for president is his way of repaying his obligation.

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The 44-year-old Republican candidate told the Libertarian FreedomFest audience on Friday how his parents made their way from Cuba to Las Vegas, where they found jobs in the casinos. Rubio says his parents embody the American dream.

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Rubio told several hundred voters in a suburban retirement community on Saturday that as president he would make the U.S. the single greatest military superpower by competing with other nations that are investing billions in new military technology. He also promised to repeal and replace President Barack Obama’s Affordable Care Act.

Rubio also repeated his stance that Yucca Mountain in Nevada is currently the only option for storing the country’s nuclear waste.

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