One of my personal favorite aircraft from WWII, the German Junkers Ju-87 Stuka dive bomber was key in the Luftwaffe's participation in the blitzkrieg tactics the German army employed. It dove down out of the sky with sirens screaming like banshees to wreak havoc and terror on those unfortunate enough to be its target. With its fixed undercarriage, invert-gull wings, and boxy cockpit, the Stuka was an ugly-looking monster hellbent on destruction.