    Sentesiée’I: Loweér-level officials improviged-for  exaimple; the FAA's Boston .Center- bypassed  the chitin ‘of command. and. ditectly contacted,  ‘NEADS: after the fist hijacking.         Sentence, 2:.‘Thé chain ‘of > command: ‘was  citéunivenied’ when. thé FAA's Boston’ Center  contacted, NEADS aealy:    