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Sen. Warren: Obama should make trade deal details public

Sen. Warren: Obama should make trade deal details public

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Philadelphia Mayor Nutter on derailed train rescue efforts

Philadelphia Mayor Nutter on derailed train rescue efforts

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A life in news, translated into poetry

A life in news, translated into poetry

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Site of train disaster didn’t have speed control system

Site of train disaster didn’t have speed control system

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Is gender identity biologically hard-wired?

Is gender identity biologically hard-wired?

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Did the Gulf nations summit fall short of U.S. hopes?

Did the Gulf nations summit fall short of U.S. hopes?

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5:59
Philadelphia residents pitch in to help train crash victims

Philadelphia residents pitch in to help train crash victims

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3:35
Amtrak crash drives Capitol Hill debate over funding

Amtrak crash drives Capitol Hill debate over funding

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7:15
See the world’s oldest-known parchment letter

See the world’s oldest-known parchment letter

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0:23
Do better-paid workers equal better business?

Do better-paid workers equal better business?

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6:55
Organic food pioneer shares life’s work, from farm to table

Organic food pioneer shares life’s work, from farm to table

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5:34
Will the Asia trade pact give U.S. companies more customers?

Will the Asia trade pact give U.S. companies more customers?

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6:18
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PBS News Hour

Why we're teaching computers to diagnose cancer

Every day, we depend on artificial intelligence to help us make sense of a steady deluge of information. AI helps the post office to sort its mail, Wall Street to make financial decisions and physicians to diagnose patients. Hari Sreenivasan reports on how tech firms are investing in the next generation of intelligent computer programs and in what ways the technology still lags behind humans.
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