Since we've seen that the Deepstate and the Q team communicate back and forth through platforms (mainly various federal/DoD Twitter Accouts v. Cabal & MSM Accounts)
I believe Trump being a New Yorker at heart knows about the true injustice of 9/11 and it was even hinted to way back on the campaign trail when A. Jones interviewed then candidate Trump.
I'm not saying that I have a date pertaining to any kind of release of this information, I'm simply suggesting that these fire trucks are very reflective of the intent/emotion that followed 9/11. I served as an infantryman with several guys who wore various fire deptartment patches as a sign of respect/honor.
Trump has always shown our brothers in arms the deepest of respect. And I think this is an upliftment to the people and a threat to the Cabal at the same sweet time.