Iran fulfilled its promise to retaliate after a U.S. airstrike killed a top general. Iranian missiles struck bases housing U.S. forces in Iraq. President Trump tweeted "All is Well!" But is this a step closer to a war? What are officials in Iran and Iraq saying about the possibility of further escalation? Also in Iran, a Ukrainian passenger plane crashed just after takeoff, killing all 176 people on board. Why did the plane go down, and who were the victims?