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The March on Washington drew 250,000 people

The March on Washington for Jobs and Freedom attracted 250,000 people on August 28, 1963.

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Its highlight was Martin Luther King's I Have a Dream speech. The National Archives keeps the official program from the day.

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The youngest Nobel laureate was 17

Malala Yousafzai was awarded the Nobel Peace Prize in 2014 at age 17, making her the youngest laureate.

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A 25-year-old shared a Nobel Prize with his father

Lawrence Bragg was 25 when he was awarded the 1915 Nobel Prize in Physics together with his father.

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Hoover Dam's concrete could pave a road across America

The concrete in Hoover Dam and its works would pave a highway 16 feet wide from San Francisco to New York City.

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