Workers at the Hog Island Pennsylvania shipyards

Pan down steel plate lowered into the hold of a ship under construction at the Hog Island shipyards / Two men work on either side of a metal with pneumatic riveting machines / VS workers being trained with cutting and riveting metal sheets / older man shows a younger man how to work smoking hot rivets / helmeted welder / Workers hammer a square, elongated piece of red hot metal / As a band plays hundreds of men wave flags