José Ferrer??? He bears NO resemblance to Cesar Romero and NEVER played The Joker.
Cesar Romero was one of the few movie stars who, during WWII, did NOT seek a commission. He wanted to be like the rest of the GIs. So, he enlisted in the Coast Guard, ultimately rising to the rank of Chief Boatswain's Mate. And he NEVER shaved that moustache, even while made up as The Joker. If you look closely, they applied the grease paint over the stache.
Sailor Steve, you get the cookie for the Cesar Romero question and the bottom half of the cookie WITH THE FILLING for the airplane question. Well done, sir.
'NOTHER QUESTION:
One of the strangest ideas come up with during WWII involved the use of Pykrete. What was Pykrete and what was the idea?