The main battle tanks that the United States and Germany have agreed to provide Ukraine will help its forces punch through Russian fortifications and retake lost territory.

Brazil’s presidential election is down to two polarizing candidates, and experts say the runoff will be a major test for one of the world’s largest democracies.

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

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…