Here's one from the UK:-
In the summer of 1940 the RAF was on high alert. Each time the siren sounded the pilots would scramble, most of the time to a false alarm.
One imaginative pilot decided this was too boring, so he bought a monkey and taught it to fly. Now when the siren sounded it was the monkey who scrambled, while the pilot stayed in his hut. The system worked very well.
Finally the war ended and the pilot went on to college and became a teacher.
Oh, what about the monkey?
He became an Air Vice-Marshall.