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President Barack Obama speaks on counterterrorism at MacDill Air Force Base in Tampa, Florida on December 6, 2016.
President Barack Obama speaks on counterterrorism at MacDill Air Force Base in Tampa, Florida on December 6, 2016.

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    Obama's speech highlights Trump's differences

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Obama's speech highlights Trump's differences

President Obama gives his final planned speech on national security and sets a tone that's expected to be much different than Trump. CNN's Jim Sciutto reports.

Obama's speech highlights Trump's differences

President Obama gives his final planned speech on national security and sets a tone that's expected to be much different than Trump. CNN's Jim Sciutto reports.