Brain Injuries Are Common in Battle. The Military Has No Reliable Test for Them.

U.S. troops at Ayn al Asad Air Base in western Iraq hunkered down in concrete bunkers last month as Iranian missile strikes rocked the runway, destroying guard towers, hangars and buildings used to fly drones.

When the dust settled, President Trump and military officials declared that no one had been killed or wounded during the attack. That would soon change.