Magnificent picture. However, I seem to have a pair of questions:

1) who is the door gunner with minigun? I mean is he one of the Attreides guardsmen, Harkonnen mercenary soldiers or even one of the Imperial sardaukar?

2) is he firing his weapon on a sandworm or on another flyer "off screen"?

If the former it would rather be a waste of munitions - low caliber bullets have no chance of penetrating the beast's hide and would, at best, remain not noticed, at worst - anger the worm even more....