The new technology may indicate that AQAP is receiving support from the Houthis.

Though they pose hazards to civilians, the weapons will be an important component of Ukraine's artillery war.

The war has shifted global trends in international influence, but the long-term effects could take several possible paths.

The United States and its partners have tried using aid conditionality to try to modify the Taliban's policies. It won't work.

Legislative changes can help the United States be more consistent in its policy response.

The U.S. effort to train and equip the Ukrainian military demonstrates the key factors for successful military aid.

The United States and United Nations remain critical actors in the diplomacy to resolve the civil war.

The increasing frequency of natural disasters will exacerbate some wars while providing opportunities to resolve others.

The shift to "over-the-horizon" operations has removed important building blocks in U.S. counterterrorism strategy.

Russia has pursued four strategies to mitigate the effects of sanctions, with mixed results.

With a little help from its friends, Ukraine can guard its maritime security in the Black Sea and protect its critical grain exports.

How community social cohesion shapes population displacement, one of today’s greatest global challenges.