Note that in an actual intercept, this thing is in space and going like 10km/s. It's job is to slam directly into an incoming Ballistic Missile re-entry craft before it can deploy nukes and decoys.

The giant nozzle pointed downwards is simulating 0-gravity, and probably does not exist on live fired craft.

Those thrusters must be extremely precision controlled too. At that flight profile, having a nozzle open an extra millisecond means missing the intercept by hundreds of feet.

And a Nuke hitting DC

And it looks small, but it's 1.6 meters long (over 5 feet) and fully fueled would weigh ~200kg/~500 lbs!!!