Four figures in gas masks and dark clothing HD Wallpaper

Four figures stand in front of a grey background. The leftmost figure has a screen for a head displaying a triangular symbol with an eye. The second figure from the left has black hair, red eyes, and wears a gas mask and suit. The third figure wears a white helmet with a skull emblem and a gas mask. The rightmost figure wears a gas mask with glowing blue eyes and a Star of David emblem is visible below.