US President Barack Obama to unveil what he called the "biggest, most important step we've ever taken" to fight climate change on Monday.

President Barack Obama signs an executive order calling for the US to build the world's fastest computer by 2025.

The US-led coalition fighting the Islamic State group is "intensifying" its campaign in northern Syria, President Barack Obama says.

President Barack Obama has raised continuing US concerns over China's cyber activities, as two days of talks between the two nations came to an end.

ISRAELI Prime Minister Benjamin Netanyahu seems close to ordering a general mobilization of his country's military, and Republicans in the United States are preparing for a ferocious battle with President Barack Obama's administration, in the wake of the framework nuclear agreement with Iran.

Hacking attacks that destroy rather than steal data or that manipulate equipment are far more prevalent than widely believed.

A Reuters/Ipsos online poll reveals President Barack Obama poses an imminent threat to the United States outranking Russian President Vladimir Putin

President Barack Obama offers condolences on Sunday on the death of Lee Kuan Yew, calling Singapore's first prime minister "a true giant of history."