The four people killed in the air raids were all civilians, which served as a stark message about the changing nature of warfare in the 20th Century.

In what Kenneth Arnold later complained was an ‘historic misquote’, the press coined the now-ubiquitous phrase ‘flying saucers’ to describe the UFOs.

French aviator Louis Charles Joseph Blériot made the first flight across the English Channel in a heavier-than-air aircraft.