Boeing factory workers in the United States have voted to go on strike, rejecting a contract offer from the aviation company. The workers, who are represented by the International Association of Machinists and Aerospace Workers District 751, expressed dissatisfaction with the proposed deal. The vote to reject the contract was 94.6 per cent, and the vote to strike was 96 per cent, according to union president Jon Holden. The strike will affect two major plane assembly plants in the Puget Sound region and involve about 33,000 workers. The workers had sought a 40 per cent wage increase. Critics argued that the proposed 25 per cent increase was misleading because it did not account for the loss of the annual bonus. Other issues included the absence of a restored pension and a perceived lack of firm commitments on future projects in the Seattle region, as per a report.