It is a reference to the old Don't Litter Commercials that used to run in the late 70's. There was an Indian with one tear running down his cheek after someone threw trash on the ground.
World War 2 ended in europe in May 2nd 1945 when Germany lost battle of Berlin.World War 2 ended in the Pacific in September 2nd after Japenese surrenderd after the US dropped 2 Atomic Bombs onto...
World War II managed to advance world technology, introducing better planes, neculear power and weapons, and advanced medical sciences. No matter how horrid the war is, science always grows out of it...