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  2. Social Security for the People: A New Era of Economic Security, 1939

    Social Security for the People: A New Era of Economic Security, 1939

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    Asteroids and the Threat to Earth: What We Can Do

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    Astronauts_Talk_to_NASA_Leaders

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  6. See and hear three years of solar fireworks

    See and hear three years of solar fireworks

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  7. Apophis 99942. Trumpet 1 - 3. Hurtling Towards Earth. 2029.

    Apophis 99942. Trumpet 1 - 3. Hurtling Towards Earth. 2029.

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  9. Russian cargo ship docks at space station with science, spacesuit and supplies

    Russian cargo ship docks at space station with science, spacesuit and supplies

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  10. Why Haven't We Returned to the Moon Since Apollo?

    Why Haven't We Returned to the Moon Since Apollo?

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