The U.S. hasn't tested a nuclear weapon in decades, and since the 1990s has used simulations and experiments to verify they're working properly. NPR was granted a rare look at how they do it. The ...

Pew Research Center conducted this study to understand how Americans’ views of artificial intelligence compare with the views of those who have expertise in the field. This report includes findings ...

Pew Research Center conducted this study to understand how Americans view discrimination against various racial, ethnic, gender, religious and other groups in the U.S. Note: Some groups are too small ...

The small island country of Trinidad and Tobago is in middle of an American military buildup. The U.S. has deployed warships and attacked alleged drug boats nearby, leaving residents on edge. Over the ...

An intense struggle has unfolded in Washington between companies and officials over where to draw the line on selling technology to China. By Ana Swanson Ana Swanson covers international trade and the ...