Out by Frelinghuysen Avenue the sky is never empty; planes drop toward Newark Liberty all night, their landing lights swinging through the falling snow like something being handed down. Aero Snow Removal LLC works those same hours on the ground — plows across the lots, walks shoveled down to bare pavement, de-icer spread before the packed track has a chance to set. Storms on this flat southern edge of the city come in sideways, and the drift builds against every fence, hedge and dock. The measure of a night is plain enough: whether the first car in at six can park, and whether the person walking to it stays on their feet. That is the entire job, and it gets finished while most of Newark is still asleep.