The year of the LV photo must be later than 1973, the year of completion of the first WTC.
In reference to the Erie-Lackawanna photo showing TWO fallen flags (the first being the EL freight itself and the second being two missing towers in the background behind the train, I downloaded it from the web but cannot recall the web site.
The year must be later than 1973. It might be before 1976 - the beginning of ConRail - since the engine is in EL livery, but it also might be later.
The photo appears to be taken by a photographer facing southeast and located somewhere in the Jersey Meadows, possibly near Secaucus. The freight is mostly boxcars and seems centered on a small rise, giving the boxcars a humped look (humped here being a geometric effect - not the railroad term!). Also in the background above the marshes is the ridge of land that forms Weehawken, Hoboken, and other adjacent NJ cities along the Hudson River.
I can email you the EL photo if you want.