The United States has pursued missile defense technologies for six decades, with mixed results. Changes under the Obama administration, including adjustments to planned defenses in Europe, could port…

The creation of a new U.S. military command for Africa signals the continent’s growing strategic importance and its many development challenges.

Trade relations between the United States and China have provided enormous benefits to both countries. But a growing U.S. trade deficit, China’s regulation of its currency, and concerns over intellec…