SCRANTON, Pa. (AP) — One of the most important munitions of the Ukraine war comes from a historic factory in Scranton, Pennsylvania. Steel rods are brought in by train to the Scranton Army Ammunition Plant to be forged into the artillery shells Kyiv can’t get enough of. The plant is at the vanguard of a multibillion-dollar Pentagon plan to modernize and accelerate its production of ammunition and equipment. It is one of just two sites in the U.S. that make the steel bodies for the 155 mm howitzer rounds that the U.S. is rushing to Ukraine. The lack of 155 mm shells has alarmed U.S. military planners, who see it as a critical shortage.