President Donald Trump will address the nation from the White House at 11 a.m., following the Iranian forces’ launch of more than a dozen ballistic missiles against two military bases in Iraq early Wednesday local time, marking the most significant Iranian attack in a growing conflict with the United States.

The al-Asad air base in western Iraq, which houses some U.S. troops, was hit by at least six missiles, according to a U.S. defense official familiar with the situation. In a tweet late Tuesday, Trump proclaimed “All is well!” and vowed to address the nation on the situation Wednesday morning.