This may have an effect on production of defense items such as drones and new AF fighters.
www.reuters.com

Boeing St. Louis defense workers set to strike from Monday after rejecting latest offer
Union members who assemble Boeing's fighter jets in the St. Louis area rejected the U.S. planemaker's latest contract offer on Sunday and will strike at midnight on Monday, the International Association of Machinists and Aerospace Workers union (IAM) said.