You are missing the fact that "big battalions are always right". 25K troops in a city is double of what allied forces were in second battle of Fallujah, you might have missed that. In a city with closed hotels, full lockdown, closed bridges and walls like Baghdad green zone cancelling a rehearsal of inauguration due to "not enough security" should tell you more than any book of laws. But you could just see ospreys flying in a place and occasion they absolutely have no business to be and skip all that and enjoy the show.