Although that has occurred to me, I don’t see any reason why President Trump would need to go Tiananmen Square in DC on July 4. If the National Guard were being mobilized ahead of the festivities I might think something was up. But tanks? To be used in an urban environment? I don’t worry about that. Yet.
I’m not thinking Tiananmen Square. At this time, I’m not really thinking about any use other than a parade. Mostly because nothing has really clicked in my brain; I haven’t been able to imagine another use. But the reason I brought it up is that POTUS usually has a purpose for what he does, particularly when he does something that gets the Twitterverse worked up.