The rise of Islamic State in Iraq and Syria (ISIS), the Islamist militant group that has seized a chunk of land stretching from northern Syria to central Iraq, has struck fear into the hearts of leaders around the world. CNN explains ISIS' roots, what it controls, and where its support comes from.
Nunung Nursiah, whose younger brother was a flight engineer on AirAsia Flight QZ8501, says she had mixed feelings when a friend sent her a link to a photo of the plane's fuselage submerged in the cloudy waters of the Java Sea.
The horrific twin attacks in Paris last week have sent shockwaves throughout Europe. Political leaders from across the EU joined millions of French mourners on Sunday, and Europeans-at-large continue to pay tribute with public vigils, flowers and candles, and minutes of silence.
It is practically an iconic photo by now -- a row of world leaders standing in solidarity next to one another, marching in Paris, united against terrorism. Most of them were men, but some were women, including Angela Merkel, the chancellor of Germany. She was right next to French President Francois Hollande.