This article has been reviewed according to Science X's editorial process and policies . Editors have highlighted the following attributes while ensuring the content's credibility: Boeing Machinists Union members Dave Hendrickson, left, and Steven Wilson, right, on the picket line at the Renton assembly plant, Friday, Sept. 13, 2024, in Renton, Wash. Credit: AP Photo/John Froschauer Blue-collar workers from Boeing walked picket lines in the Pacific Northwest instead of building airplanes on Friday after th ...