Does 'At least some FAA officials in Boston Center and the New England Region knew that a hijacker on board American 11 had said we have some planes.' neither support nor refute 'American 11 was checked by the FAA and was cleared for landing.', instead existing independently?
At least some FAA officials in Boston Center and the New England Region knew that a hijacker on board American 11 had said we have some planes.###American 11 was checked by the FAA and was cleared for landing.