Once America entered the Second World War, workers at home were as battle-engaged as soldiers overseas. At Penola, Inc, a grease plant in Pittsburgh, for example, employees worked long hot hours manufacturing “Eisenhower grease” for use on tanks, planes, and weapons. In an effort to humanize its image, the corporation hired a young photographer named Gordon Parks and asked him to document its factory workers and their contribution to the country. With deft staging and lighting, Parks created images of power that became a huge source of pride for the industrial town. The more than 50 photographs here on view have never before been exhibited. —Elena Clavarino