JFK's assassination spawned conspiracy theories ranging from the plausible (for example, that he had been done in by military contractors, who stood to lose tens of billions of dollars if he kept his vow to pull out of the Vietnam War) to the laughable.

For example? According to one theory, Kennedy, who rarely wore hats, was murdered by hat makers (milliners) who hoped that Lyndon B. Johnson's habitual hat-wearing would start a trend and boost their sales.

[Sales of hats indeed increased, just as sales of undershirts plummeted after Clark Gable boldly appeared without one in the 1934 romantic comedy It Happened One Night.]