U.S. planemaker Boeing sent a new contract offer on Thursday to the union representing roughly 3,200 factory workers at Boeing's defense division, mostly in the St. Louis area. It contains some minor compensation changes that would benefit senior union members,

More than 3,200 Boeing employees at defense division factories in the St. Louis area could walk off the job Sunday, halting production of the aerospace company’s fighter jets.

Approximately 3,200 Boeing employees who build fighter aircraft and munitions could strike as soon as next week.