There was a lot of noise about 10-4 being the date something would happen and so much was obviously control opposition and a distraction, but what if the point was not the theories but whether they were signalling something else.
10-4 means 'understood' and usually is the last communication before executing orders.
What if that was the signal to start the conflict. They had a set delay between communication and it was to be called off if there was any problems, but it was confirmed and ago.
9-11 also occured with the help of training exercises.