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Behind the UK's reportedly sweeping cyber surveillance

Behind the UK's reportedly sweeping cyber surveillance

Behind the UK's reportedly sweeping cyber surveillance

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Pope Francis wraps up first-ever visit to U.S.

Pope Francis wraps up first-ever visit to U.S.

Pope Francis wraps up first-ever visit to U.S.

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Watch Iranian President Rouhani's address to United Nations

Watch Iranian President Rouhani's address to United Nations

Watch Iranian President Rouhani's address to United Nations

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Trump uses tax plan to push back on criticisms

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U.S., Russia offer little give on Islamic State strategy

U.S., Russia offer little give on Islamic State strategy

U.S., Russia offer little give on Islamic State strategy

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Striving for girls’ education in the birthplace of Voodoo

Striving for girls’ education in the birthplace of Voodoo

Striving for girls’ education in the birthplace of Voodoo

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Russian President Putin's full address to United Nations

Russian President Putin's full address to United Nations

Russian President Putin's full address to United Nations

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Could water on Mars mean life on Mars?

Could water on Mars mean life on Mars?

Could water on Mars mean life on Mars?

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Egypt’s president on fighting Islamic State, U.S. relations

Egypt’s president on fighting Islamic State, U.S. relations

Egypt’s president on fighting Islamic State, U.S. relations

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Skygazers moonstruck over ‘super’ rare eclipse

Skygazers moonstruck over ‘super’ rare eclipse

Skygazers moonstruck over ‘super’ rare eclipse

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PBS News Hour

Watch Pope Francis' full address to the UN General Assembly

In his speech to the United Nations on Friday, Pope Francis said there is a "right of the environment" and that mankind didn't have the authority to abuse it.