A voice from HQ, crisp and low-key: 'Roger that. Air support. ETA eight minutes. Out.'

The Vector jerked forward again and the dust thrown up by its wheels thickened into dense clouds. He could smell cordite and hear the ceaseless percussion of gunfire but couldn't see further than the end of his nose. He couldn't see the enemy. And now he couldn't even see the flash of their weapons.

The brown dust seethed between the brown Vector and the brown walls. Dave was firing into a brown void. He paused. Behind him he heard the crackle of the other Vectors' machine guns, fast, urgent, high-pitched against the more sporadic chatter of light weapons. Next to him was the deep thrumming of Rifleman Nelson's GPMG. What the fuck was everyone firing at? Could any of them see anything? Or did it just feel better than not firing?

He listened to the crack of the bullets and the thump as they landed, gauging the gap between the two sounds. He estimated that the enemy were mostly within 100 metres, some very close indeed. But the roar of the Vectors and the echoes around the walls could distort your judgement.

He searched the blank clouds of dust for a target. The Vector rumbled on. And then, without warning, the dust curled in a new direction. Suddenly there was a crack in the brown cloud and he could see through it. Low shop fronts loomed close by him, their metal shutters rolled down, then a narrow side street. Empty. No, it wasn't empty. A figure. Several doorways along, half hidden in the shadows.

Dave took in two things about the man: the way his pale blue robes flowed around him like water, and the fact that he was carrying an RPG. Dave raised his weapon until the optic sight cut into his line of vision. He focused into the post sight. He was aiming at the target's centre of mass: the man's chest. He squeezed the trigger just as the Vector jolted.