May was a momentous month for manufacturing in which machinists at Pratt & Whitney went on strike and marine drafters at Electric Boat nearly went on strike.

About 3,000 machinists at jet engine-maker Pratt & Whitney in Connecticut have approved a new four-year contract, ending a three-week strike over wages, job security and other issues.

Union members at aircraft engine maker Pratt & Whitney overwhelmingly approved the company's contract offer on Tuesday, ending a three-week strike, according to the International Association of Machinists and Aerospace Workers.