U.S. condemns S. Sudan opposition leader's call for renewed war
Riek Machar, the country's former first vice president, and his allies ordered their forces to reorganize for "armed resistance" to the South Sudan government
South Sudan rebels say govt troops attack base in north, threaten retaliation
Rebel forces threaten swift retaliation, stoking fears of another full-blown military confrontation in the young nation
South Sudan urges Sudan, neighbours not to let opponent launch rebellion
The growing tensions threaten to plunge South Sudan, which won independence from Sudan in 2011, back into full-blown conflict
Aid workers pulled out of volatile South Sudan region
Insecurity across South Sudan has uprooted some 1.6 million people from their homes and another 1 million have fled the country
Obesity, violence hamper U.S. progress on UN health goals - study
"(It is) a starting point for further investigation on how and why countries are under-performing or performing well"
Celebrities from Sting to Pussy Riot support 'We Are Not Afraid' refugee campaign
According to UNHCR data, at least 65 million people are currently displaced around the world
Sudan threatens to close border with South Sudan within days
Sudan regularly accuses its neighbour of backing insurgents in the Darfur, Blue Nile and South Kordofan regions that run along its southern border.
Number of refugees fleeing South Sudan tops one million - U.N.
"With this milestone, South Sudan joins Syria, Afghanistan and Somalia as countries which have produced more than a million refugees"
South Sudan not yet acting on pledge to work with UN, official says
S. Sudan agreed to accept 4,000 extra peacekeepers and to allow those already on the ground to move around freely so they can protect civilians
'Lack of options' force 4 million to flee from one conflict to another - report
"My parents and my wife asked me many times, 'Please move to another country that's safe'"