An intense explosion of The Los Angeles Times building in 1910 was responsible for the deaths of 21 people.

Although only part of a series of bombings across the country, the explosion of the L.A. Times building is now the front-runner of a "dynamite conspiracy," according to the Library of Congress.

The Times itself would label the bombing the "crime of the century."

Responsible for the violent explosion were the brothers John and James McNamara. The latter one, who set the dynamite, was sentenced to life in prison, John received 15 years in prison.

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