The threat of climate change and the rise of China have prompted renewed debate about the U.S. government’s role in shaping the economy.

Boko Haram, known for mass kidnappings, bombings, and other acts of terrorism, remains an enduring threat to northern Nigeria and the Lake Chad Basin.

China, India, and Pakistan have relatively small but growing nuclear arms programs. This nuclear competition is raising concern because of long-simmering tensions and a lack of efforts at minimizing …

Al-Qaeda in the Arabian Peninsula has emerged as one of the most dangerous al-Qaeda affiliates, strengthening amid political unrest in Yemen.