US Boeing workers strike over pay
Yesterday they were poised to strike, and today they walked out.
Production at the world's biggest aircraft manufacturer, Boeing, has stopped.
27,000 workers went on strike at the plant over pay.
Members of the Machinists Union, mainly based in Seattle, downed tools after last minute negotiations failed.
Boeing says it has offered more than $34,000 (£17,000) per employee in pay and benefits.
Analysts say the stoppage cause further delays in the delivery of the new Dreamliner aircraft.
The union says with that with Boeing's record profits and its members going without a pay rise for the last four years, the offer is not good enough.
The Machinists Union is Boeing's biggest labour group, and the company has said it will not try to assemble aircraft during the strike.
Analysts say that the stoppage could cost Boeing at least $100m each day in lost revenues - as well as delays in delivering the Dreamliner.
Even the state governor is calling for both sides to end the dispute quickly.