An American negotiator played a key role in helping Colombia end it's half-century war between the government and the FARC guerrillas. Here's how he did it.
The goal of curing all diseases "in our children's lifetime" sounds a lot like hype. But is it? It's the goal of Facebook founder Mark Zuckerberg and his pediatrician wife, Priscilla Chan.
When news broke last month the National Security Agency might have been hacked, suspicion fell on Russia. Now some analysts think an NSA insider might have been involved, wittingly or not.
At least 50 First Nations and tribes signed a treaty Thursday opposing tar sands expansion plans that they view as "a collective threat to our Nations."
Syria is unleashing its air power on rebel-held Aleppo, saying it will reclaim all of the embattled city. A target of the air assault appears to be the White Helmets — the volunteer rescue group that works in the opposition area and has been talked about as a contender for the Nobel Peace Prize.
Warplanes blasted the rebel-held section of the Syrian city of Aleppo, marking a clear failure of Secretary of State John Kerry's efforts to resurrect a cease-fire. Syria declared plans to fully recapture the city.
Warplanes were pounding rebel-held areas of the northern city of Aleppo, and a group of volunteer search-and-rescue workers known as the White Helmets says its centers were targeted by airstrikes.