Boeing workers at three Midwest manufacturing plants where the company builds military aircraft and weapons went on strike on Monday.

The International Machinists and Aerospace Workers union said on July 27 that a vote by District 837 members was against a proposed contract from Boeing, and the union said a "cooling off" period would keep a strike from beginning for another week, until Aug. 4.

Why are Boeing workers on strike?

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The Associated Press reported that the strike began at Boeing facilities in St. Louis; St. Charles, Missouri; and Mascoutah, Illinois, after 3,200 Boeing union workers, who assemble fighter jets, voted Sunday to reject a modified four-year labor agreement.

The deal would have raised the average pay wage by about 40% and included a 20% general wage hi

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