After rejecting the company's second proposed contract, union members in the St. Louis area began striking Monday. They said they will not stop until they receive a fair deal.

(Reuters) -Unionized workers who assemble Boeing's fighter jets in the St. Louis area rejected Boeing's latest offer on Sunday and will strike at midnight on Monday, the International Association of Machinists and Aerospace Workers union said.

More than 3,000 Boeing machinists entered their third day of a strike on Wednesday. The workers, who make fighter jets and weapons systems at facilities in Illinois and Missouri, are organizing for better pay, benefits and scheduling. The walk-out comes in what is supposed to be a turnaround year for Boeing .