The McNamara Brothers

Los Angeles Times bombing
Rubble of the Los Angeles Times Building in 1910
Location	Los Angeles, California, United States
Date	October 1, 1910 1:07 a.m.
Target	Los Angeles Times Building
Attack type	Time bombing, fire
Weapons	Dynamite
Deaths	21
Non-fatal injuries	100+
Perpetrators	John J. McNamara James B. McNamara

The Los Angeles Times bombing was the purposeful dynamiting of the Los Angeles Times Building in Los Angeles, California, on October 1, 1910 by a union member belonging to the International Association of Bridge and Structural Iron Workers. The explosion started a fire which killed 21 newspaper employees and injured 100 more. It was termed the "crime of the century" by the Times.

Brothers John J. ("J.J.") and James B. ("J.B.") McNamara were arrested in April 1911 for the bombing. Their trial became a cause célèbre for the American labor movement. J.B. admitted to setting the explosive, and was convicted and sentenced to life in prison. J.J. was sentenced to 15 years in prison for bombing a local iron manufacturing plant, and returned to the Iron Workers union as an organizer.

The Iron Workers Union was formed in 1896. As the work was seasonal and most iron workers were unskilled, the union remained weak, and much of the industry remained unorganized until 1902. That year, the union won a strike against the American Bridge Company, a subsidiary of the newly formed U.S. Steel corporation. American Bridge was the dominant company in the iron industry, and within a year the Iron Workers Union had not only organized almost every United States iron manufacturer, but had also won signed contracts including union shop clauses. The McNamara brothers were Irish American trade unionists. John (known as J.J.) and his younger brother James (known as J.B.) were both active in the International Association of Bridge and Structural Iron Workers (the Iron Workers).

In 1903, officials of U.S. Steel and the American Bridge Company founded the National Erectors' Association, a coalition of steel and iron industry employers. The primary goal of the National Erectors' Association was to promote the open shop and assist employers in breaking the unions in their industries. Employers used labor spies, agents provocateurs, private detective agencies, and strike breakers to engage in a campaign of union busting. Local, state, and federal law enforcement agencies generally cooperated in this campaign, which often used violence against union members. Hard pressed by the open shop campaign, the Iron Workers reacted by electing the militant Frank M. Ryan president and John J. McNamara the secretary-treasurer in 1905. In 1906, the Iron Workers struck at American Bridge in an attempt to retain their contract. However, the open shop movement was a significant success. By 1910, U.S. Steel had almost succeeded in driving all unions out of its plants. Unions in other iron manufacturing companies also vanished. Only the Iron Workers held on (though the strike at American Bridge continued).