More than 9 million people in Syria have been affected including 3.5 million people living in areas under siege without medical care.
The percentage of high school students who tried e-cigarettes had more than doubled in a year, according to a CDC study.
Wal-Mart's Wild Oats initiative has stoked controversy about the place of major corporations in the organic food sector.
President Obama's trip to Asia has a political tone, but several key economic issues will likely to be discussed.
Advocacy groups worry the helicopters will be used to continue the Egyptian military's violence against civilians.
Much of HBO's programming, though not its mega-hit "Game of Thrones," is headed to Amazon Prime's Instant Video service.
A handful of startups have created new learning platforms based entirely on mobile phone technology in sub-Saharan Africa.
The giant Internet retailer's broadening ambitions and improving margins likely boosted first-quarter earnings.