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A Russian convoy of nearly 300 trucks has left for eastern Ukraine, carrying what Russia claims to be humanitarian aid. Ukrainian leaders suspect the convoy could be a cover for a military operation. Katherin Hille of the Financial Times joins Robert Siegel to discuss the situation.

South Sudan is facing the worst food security situation in the world, according to the United Nations and the Obama administration, which announced it would provide another $180 million to help feed the people of South Sudan. The U.S. has been warning that the country could face famine as rival political factions fail to make peace.

He was persecuted because some of his own countrymen didn't like the tribe he belongs to. Now the quiet 27-year-old is an anti-tribalism activist.

A panel convened by the World Health Organization has approved the use of experimental drugs and vaccines to combat the Ebola outbreak, so long as certain conditions are met.

Tensions are still high in a Missouri town where a black teenager was fatally shot by a police officer on Saturday. Religious leaders and activists are calling for calm and peaceful demonstrations after three nights of protests that alternately involved looting and police in riot gear.

Arizona Edition - We’ve been talking with candidates for state office. In this interview, we hear from Republican for Arizona Secretary of State, Michele…

Linguist Mark Liberman, who works at the University of Pennsylvania, says the use of "um" or "uh" can provide signs about the speaker's gender, language skills and life experience.

The urine test employers typically use to detect marijuana picks up cannabis smoked or swallowed days or weeks earlier. Should firms be allowed to fire workers who legally use marijuana at home?

Studies warn that climate change will threaten corn production in coming decades. Meanwhile, farmers are experimenting with new planting methods in hopes of slowing soil erosion from torrential rains.

In just a few years, the issue has gone from mostly whispers to receiving the attention of the White House. Now, colleges throughout the country are trying to increase awareness about the issue.