The advanced U.S. fighter aircraft will mark a significant upgrade to Ukraine’s air force, but their impact on the war with Russia will hinge on several factors.

The public debate in South Korea over nuclear weapons reflects South Korean desires to have greater agency over their own security, shaped by factors beyond concerns over U.S. credibility.

A global surge in avian flu outbreaks in birds and some mammals is worrying poultry farmers, scientists, and health experts. The trend is provoking questions about the future of the disease and globa…

CFR invited the presidential candidates challenging President Trump in the 2020 election to articulate their positions on twelve critical foreign policy issues. Candidates’ answers are posted exactly…