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Overview: President Donald Trump announced "major combat operations" against Iran on Feb.

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WATCH: 1-on-1 with Evan Gershkovich: ABC News exclusive

President Trump and the leaders of the country's largest artificial intelligence companies have signed a set of voluntary safety standards, as calls mount for tighter guardrails on powerful AI technology.

The Trump administration used funds from Homeland Security to air TV ads featuring President Donald Trump in recent days, according to sources familiar with the matter.

Caleb Flynn, former "American Idol" contested, found guilty of murdering wife

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The 14th test flight of SpaceX's Starship successfully achieved orbit Monday morning and splashed down in the Pacific just before noon.

and Iranian negotiators are talking via mediators, but insists he has "offered them NOTHING" to get a peace deal done.

WATCH: Holiday airfare prices hit highest levels in a decade

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Christa Pike is scheduled to die by lethal injection Wednesday in Tennessee.

Former special counsel Jack Smith is testifying before the Senate Judiciary Committee about his investigations into President Trump, including the classified documents case.

WATCH: Justin Verlander’s emotional final start

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