The unprecedented Iranian attack on Israel presents U.S. officials with mounting challenges in trying to contain the conflict and maintain a deterrence against Iran and its allies.

The Iranian regime’s first direct attack on Israeli territory could trigger further exchanges between the two sides and raises the most serious risk of regionwide conflict since the Israel-Hamas war …

A failure by the United States to continue military aid to Ukraine would spell disaster for Ukraine and its Western allies while emboldening Russia and other potential aggressors.

If Western allies fail to send Ukraine the weapons it needs, the odds increase of the war dragging on indefinitely, at a terrible cost to both Ukraine and Russia and a growing risk to the wider world…

Russia is targeting Ukrainian cities and civilian infrastructure with Iranian-made loitering munitions. Are these weapons effective in shaping the war? 

The collapse of the Cold War–era nuclear arms treaty signals trouble for U.S.-Russia relations, European security, and nonproliferation efforts.