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News Wrap: David Cameron calls for airstrikes in Syria

News Wrap: David Cameron calls for airstrikes in Syria

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Albuquerque’s crazy idea: giving homeless people jobs

Albuquerque’s crazy idea: giving homeless people jobs

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Iraq’s Yazidi’s return home to Sinjar

Iraq’s Yazidi’s return home to Sinjar

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Were pilgrims America’s original economic migrants?

Were pilgrims America’s original economic migrants?

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France, Russia unify to fight Islamic State

France, Russia unify to fight Islamic State

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Is it possible to build 'meat' out of plant protein?

Is it possible to build 'meat' out of plant protein?

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225 Years of Presidential Thanksgiving meals

225 Years of Presidential Thanksgiving meals

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Hamilton Jordan's coming of age in the segregated South

Hamilton Jordan's coming of age in the segregated South

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Residents react as their tent city is dismantled

Residents react as their tent city is dismantled

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Gunman storms Planned Parenthood in hours-long siege

Gunman storms Planned Parenthood in hours-long siege

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Survivor of the Paris attacks shares his path to healing

Survivor of the Paris attacks shares his path to healing

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GOP 2016 candidates face critical moment as field tightens

GOP 2016 candidates face critical moment as field tightens

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3:47
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PBS News Hour

How Einstein’s theory of relativity changed the world

This week marks the 100th anniversary of the publication of papers laying out Albert Einstein’s theory of relativity. In honor of the anniversary, Gwen Ifill examines how Einstein changed our understanding of the cosmos with Einstein biographer Walter Isaacson.
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