US Defence Secretary Chuck Hagel resigned on Monday, leaving under pressure as President Barack Obama faces critical national security challenges, including fighting Islamic State in Iraq and Syria and revising plans to exit Afghanistan.
Leaders from the G20 group of nations agreed on Sunday to boost flagging global growth, tackle climate change and crack down on tax avoidance but ties between the West and Russia plummeted to a new low over the crisis in Ukraine.
President Barack Obama on Friday pledged a $3 billion US contribution to an international fund to help poor countries cope with the effects of climate change, putting the issue front and center of the G20 Leaders Summit in Australia.
US President Barack Obama's executive action on immigration is expected to include some modest changes to make it easier for technology companies to retain high-skilled workers frustrated by long and unpredictable waits for green cards.
President Barack Obama has approved sending up to 1,500 more troops to Iraq, roughly doubling the number of US forces on the ground helping Iraqi and Kurdish forces battle the militant group Islamic State, US officials said on Friday.
President Barack Obama on Saturday urged Americans to avoid hysteria over Ebola, and played down the idea of travel bans from Ebola-ravaged countries in West Africa, explaining that restrictions could make things worse.
President Barack Obama has appointed a former White House adviser as Ebola "czar" and named officials to bolster the response to the disease in Texas, the center of US Ebola cases, as the death toll in three West African nations topped
The effectiveness of the US-led coalition effort in Syria is under scrutiny as Islamic State fighters try to overrun a strategic Syrian town on Turkey's border.
The United States and its allies, including Gulf states, have con
US President Barack Obama and new Indian Prime Minister Narendra Modi vowed to expand and deepen their countries' strategic partnership and make it a model for the rest of the world.
In a joint "vision statement" iss
Air raids believed to have been carried out by US-led forces hit three makeshift oil refineries in northern Syria on Sunday as part of a campaign against Islamic State, a human rights group said.
The US has been carrying out strik