The soviet sisters worked in factories building things to destroy the nazi threat and so did the american babes during WW2.It's just a factory safety poster.In this part of canada many crashed american-built bombers are still in the forests(one near Valleyview Alberta)The b-26 still has the painted red stars visible on the wing remains.Painted on before it left the factory in Montana. These free gifts to communism were almost ready for immediate combat after reaching russia.The flight routes converged west through alaska."The west was on their side and they weren't on ours".