Since 2011, the civil war in Syria has been the biggest driver of displaced populations. And renewed strife in Iraq and sectarian tensions in Nigeria have meant refugees on a scale that is taking even experts in the field by surprise.
As pro-democracy protests continue in Hong Kong, critics are calling for US sanctions on China. But, as long as the demonstrations remain largely peaceful, some US-China experts counter that the US is right to take a cautious approach, especially publicly.
President Obama's private dinner with new Indian Prime Minister Narendra Modi Monday might will be an opportunity for both Mr. Modi and Mr. Obama to address key issues to both countries. Here are five:
President Obama presides over Security Council session that unanimously adopted a binding resolution that aims to 'degrade and destroy' terrorist access to funding and shut down the Islamic State's 'network of death.'
Saying that 'the future of our civilization depends on us coming together' to fight Islamist extremists, Mr. Obama told the United Nations General Assembly that military action was necessary because 'the language of force' is the only one they understand.
President Obama says that the participation of Saudi Arabia, the United Arab Emirates, Jordan, Bahrain, and Qatar in the Syria strikes 'makes it clear to the world that this is not America’s fight alone,' but the depth of their involvement is not clear.
Saa, who uses a pseudonym to protect her Christian family back in Nigeria, leaped from her captors' truck and ran through a deep forest to safety. There's now speculation that the remaining girls may be being used as suicide bombers.
In the Islamic State video, British journalist John Cantlie explains what he says is the 'truth' about the Islamic State. The video appears to target the war-weary populations of the West, the US and Britain in particular.
Ukrainian President Poroshenko's call for more military and economic aid has won strong backers in Congress, including among Democrats, but President Obama has been wary of offering lethal military aid.
More than three dozen nations have signed on to the anti-Islamic State coalition, US officials say. But Russia and Iran are also likely to play roles, and some Arab countries will prefer to keep quiet about their help.
The ramped-up US sanctions come less than two weeks before President Obama is set to hold a UN Security Council summit on the issue of foreign fighters who aid international security threats like the Islamic State.
President Obama strove to differentiate this new battle with terrorists ‘unique in their brutality’ from the wars he inherited, in particular the war in Iraq. His intervention rationale placed a priority on humanitarian reasons.