Around 3,200 workers at 3 different Boeing factories went on strike on Monday, marking the company’s 2nd strike in less than a year.

Boeing is being hit with its second strike in less than a year after 3,200 hourly workers walked off their jobs building military aircraft.

Three Boeing defense plants face a strike as 3,200 machinists walked off their jobs. Members of the International Association of Machinists voted to strike.