Page "History of California 1900 to present" Paragraph 8

In 1910, Los Angeles was still an open shop and employers in the north threatened for a new push to open San Francisco shops.

Responding, labor sent delegations south in June 1910.

National organizers were sent in during a lockout of 1, 200 idled metal-trades workers.

Then occurred an incident that would set back Los Angeles organizing for years, On October 10, 1910, a bomb exploded at the Los Angeles Times newspaper plant that killed twenty-one workers.