The air quality in places like New York and Chicago has prompted warnings for sensitive groups including children and the elderly.

Eighty years ago, the US dropped a nuclear bomb on Japan, the only nuclear weapon ever used in warfare.

This is the story of the internet's first social image by a little-known band made up of CERN employees.

Officials say the fire is advancing rapidly, driven by strong winds, dry vegetation and hot summer weather.

At the ceremony, Japan's PM urged all countries to work towards nuclear disarmament.

A state media report said no casualties were caused when the tornado touched down in the region.

The Nebraska representative faced backlash over President Trump’s tax and spending bill, which was signed into law in July.

Hiroshima students have spent weeks visualising the stories of survivors from the atomic bomb and turning them into art.

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