Women in war. Machine gun production operators. A woman's place is on the production line in this Midwest plant which has been converted from the manufacture of spark plugs to machine guns. Elsie M. Terry, one of 2,000 women employed here, is a skilled milling-machine operator who is making an important contribution to the war effort. She's making guns for America's armed forces. A.C. Spark Plugs. Sourced from the Library of Congress.