Confuscious Say: He who ------ in another man's well often catches crab.?

Questions

John Maynard Keynes (in Cambridge, England), another economist, born.?

Dennis Gabor, inventor of holography (3D laser photography), born.?

Battle of France begins in WW II.?

First synthetic rubber tire exhibited Akron, OH.?

First B-29 bombing raid one plane lost; engine failure.?