If I was a leader in ISIS, I would have my people in America volunteer for the services, and get assigned to the repair area where the most damage could be done. Conspiracy theory??? Who knows what evil lurks in the minds of men? (Yeah, I know, who does.)
Most of the work done at depots is done by civil service employees or contractors.
Except ISIS doesn’t have people in the US. And the whack jobs that consider themselves followers are too stupid to know which end of a screwdriver to use.