The one on the air base? I'm not sure there's much to say. It was a face saving "attack" by Iran. From what I've heard on the radio, all U.S. personnel were in bunkers and quite safe. The Pentagon and Ft. Meade were aware of the launches as soon as they happened. It's my understanding through satrliites and tracking the heat signatures of the launch it was not a huge threat.
I should think, if the Iranian government really wanted to kill many Americans in Iraq there are better way such as car bombs, suicide bombers or a group of men armed with rifles making an attack.