Consider the premise. Does the hypothesis stand independently without contradicting or following it? Premise: In sum, the protocols in place on 9/11 for the FAA and NORAD to respond to a hijacking presumed that Hypothesis: Protocols on 9/12 for the FAA and NORAD to respond were used. 
In sum, the protocols in place on 9/11 for the FAA and NORAD to respond to a hijacking presumed that###Protocols on 9/12 for the FAA and NORAD to respond were used. 