As twin explosions in Volgograd raise concerns of terrorist attacks disrupting Russia’s Winter Olympics in February, expert Dmitri Trenin explains the root causes of insurgency in the North Caucasus.

At a crucial moment for Ukraine and its economic viability, the EU and United States should join efforts with Russia to try to stabilize the country, says veteran journalist Serge Schmemann.

A refugee crisis in northern Iraq’s Kurdish region is intensifying as winter approaches and the threat posed by ISIS forces shows no signs of abating, says journalist Jane Arraf.

Unrest and accusations of police brutality in Brazil’s slums have threatened Rio’s security—and the country’s image—as it comes under a global spotlight with the World Cup, says expert Janice Perlman.