The moment we stepped into the non secure part of the airport, we saw armed law enforcement K9 units. Then, as we drove through downtown Denver there were "troops" of officers on nearly every corner. We even saw several of these troops hanging off of SUV's.
As someone involved in local government, it is mind blowing to think about the coordination necessary just to make sure that the security concerns here at the Convention are adequately addressed. Again, Denver, the DNC and federal, state and local law enforcement agencies seem to be ahead of the game.