And as the injury toll has mounted, veterans groups and others have levied criticism at the White House, in part because, in January, President Trump dismissed the injuries as "not very serious." "I heard that they had headaches and a couple of other things," Mr. Trump said at a news conference Jan. 22 in Davos, Switzerland. "I don't consider them very serious injuries relative to other injuries I have seen." At least a dozen missiles were fired during the attack, which was a retaliation for the killing of a top Iranian general, Qassim Suleimani, by an American drone strike in Baghdad on Jan. 3. The Trump administration at first said there were no injuries, but a week later said several service members were evaluated for possible concussions.