I am not sure what this photo is really about. A photo of some US army guys saluting a Star Wars Imperial Stormtrooper. Imperial Stormtroopers are Emperor Palpatines personal army and used by him and his commanders. Where as Stormtroopers in real life, were specialist German soldiers in the Army in World War I, also known as Shock Troops.
Star Wars Cool Fact. There was a division of Imperial Cold Assault Stormtroopers called Blizzard Force and they worked with AT-AT assault vehicles and together they worked on Hoth to find and destroy the Alliance base.