The attack in eastern Germany is another alarming example of how the terrorist threat is evolving, with more far-right perpetrators attempting to broadcast their brutality.

The summit will feature the highest-profile talks in years on the war between Ukraine and Russia-backed separatists, but the parties will have to bridge major divides to find a permanent end to the c…

With this major U.S.-Russia nuclear arms control agreement set to expire next year, Washington should coordinate with Moscow for a New START treaty extension to allow for further negotiations and the…

A changing climate and growing competition for resources is raising tensions among Arctic nations.