A dramatic confrontation unfolded at the United Nations as U.S. and Iranian officials traded sharp accusations over escalating strikes on Iran. The U.S. ambassador defended President Donald Trump’s decision, arguing that decisive action was necessary and that diplomacy alone could not deter threats to regional allies. In response, Iran’s UN envoy condemned the strikes as “unjustified aggression,” calling them a war crime and alleging heavy civilian casualties, including children. Washington rejected those claims, framing the operation as defensive and essential to regional security.