Why did Atta have to check two of his bags ?
Mickey Kaus of Slate.com , referring to Tom Maguire 's " Two Attas " theory , speculates that " the ' Atta ' fingered by Able Danger was really the first , ' Abu Nidal ' Atta , and not the second , 9/11 ' Al Qaeda ' Atta , " and that this may help explain this Able Danger issue .