Mohamed Atta
Since 9/11, of course, we have retrieved every scrap of information ever known about Mohamed Atta, so we know what information would have been available to the Able Danger data mining operation. And what we know is that Mohamed Atta sent his first email to friends in the U.S. in March 2000 and received his first U.S. visa on May 18, 2000. Moreover, that was the first time he had ever gone by the name "Mohamed Atta." His full name is "Mohamed Mohamed el-Amir Awad el-Sayed Atta", and prior to 2000 he went by "Mohamed el-Amir".