Benin's right - it could just be a decommissioned tank with no ammunition/fake turret. But I'd imagine what pluk says is true either way; it's obviously a very expensive piece of equipment whether it's decommissioned or not, but seeing that Thorpe have gone to the lengths of nabbing a plane, a fire engine, a helicopters and numerous other vehicles to theme The Swarm's area I wouldn't be too surprised if the tank did stay. Even to 'rent' this tank would cost money Thorpe could easily save by printing off more fly-posters and hiring more crazed crack-pots, so it seems unusual they would do this even for promotion purposes if they hadn't purchased it.Mind you, all this is nice and pleasing: it promotes the ride, gives enthusiasts something to chew over, and contributes to the realism of the theme, but it'll all amount to nothing if Thorpe replicate Saw-style themeing. We can't really argue that there was some brilliant pieces of themeing for Saw (the rotating saws, the boiler tank, the traps) but the efforts are diluted because none of it was implicitly connected with each other, nor are they placed very well (the traps particularly do seem very randomly placed among cattle-pen queue lines). I'd rather not have a tank at all if Thorpe intend to dump it somewhere barely in view when the ride opens with some vague connection to other themeing, especially seeing as it looks very new and doesn't bode with the destroyed theme the plane, the helicopter and the fire engine share. I don't want to see it randomly placed amidst little or no other themeing and I'm sure others would agree - it needs to be something consistent. What I'm saying is a dirty tank half sunk in a pot-hole or crushed under a fallen wall are credible as a piece of "urban devastation" than a nice clean tank sat comfortably on some fresh green grass, or even gravel. This attention to detail is taken into account with the other pieces of themeing already, so if Thorpe do intend to keep the tank, at least make it look like it wasn't a (relatively) last minute decision.