Homes with dirt floors can make people sick. Replacing them with concrete floors helps cut risks but isn't always affordable. A new project in Rwanda relies on a low-cost alternative.
The Islamist militant group had threatened to kill Steven Sotloff if the U.S. continued to conduct airstrikes in Iraq. Sotloff's mother released a video last week pleading for the release of her son.
Publication of private photos of Jennifer Lawrence and other celebrities raises new questions about storing personal data online. Apple says its systems weren't breached.