Ukraine’s intensifying crisis has the Obama administration hinting at tougher sanctions against Russia, which could threaten Moscow’s ability to trade and invest, says CFR’s Robert Kahn.

The protests sweeping Afghanistan over the burning of Qurans at a U.S. base may spread to other Muslim countries unless U.S. and NATO officials act swiftly, says CFR’s Ed Husain.

The Russian and Chinese veto of a UN Security Council resolution calling for an end to violence in Syria calls into question the viability of the Responsibility to Protect doctrine and poses a dilemm…

CFR’s James M. Lindsay remembers the signing of the North Atlantic Treaty in Washington, DC, on April 4, 1949, and discusses the difficulty inherent in pursuing fundamental changes to a nation’s fore…

A leaked government document has recharged the controversy over the use of lethal force against U.S. citizens. CFR’s Matthew C. Waxman highlights three legal considerations.