The Wisconsin State Capitol Collapses:

In 1933, The Madison Capital-Times ran a cover story that reported the state capitol building as having collapsed due to a series of explosions caused by “large quantities of gas, generated through many weeks of verbose debate in the Senate and Assembly chambers.” Despite the fact that no one was hurt in the story, and it ended with the phrase “April Fool,” many readers were upset by the hoax. I’m not totally sure why, although it could have to do with the fact that a wing of the building had actually collapsed 50 years earlier resulting in 4 deaths.