Will Israel and Iran heed the call of world leaders to de-escalate tensions that could potentially lead to a region-wide war. Iran vowed a massive response but has so far had a muted reaction. In another tense part of the world, U.S. and European leaders stress the urgency of air defense for Kyiv as Russin attacks intensify. After months of delay, U.S. lawmakers plan to vote on aid for Ukraine Saturday. And a look at a coordinated international effort to support Ukraine’s government in its investigation and prosecution of Russian war crimes since its invasion in February 2022.