What do you think is more likely? That there is not a single stream of water hitting it, or there are plenty of fire fighters at the scene you just happen not to have seen any pictures of them?
There were thousands of firefighters on scene at the World Trade Center, yet not a drop of water was ultimately poured on the fires. This may be well beyond their capability to stop.
If the WTC fire hadn't been a government conspiracy it could easily have been stopped if they just had asked a few internet forums or Twitter users, right?
Yeah, nothing like a bunch of boys online with delusions of the grandeur of their own intellect, second-guessing professionals who probably had plans for such an occurrence in place already anyway.
it could be that controlling the burn at this time means not using water. its a fair question if the observation is correct. if your observations dont match your assumptions, question your assumptions.