Manpower. Americans all. His war job gives Michael Kassalo an extra good appetite. Operating a vertical turret lathe in a Midwest tank plant, Michael is one of many hundreds of first and second-generation Americans whose sole purpose during working hours is to get as many tanks as possible off the lines and ready for shipment to the fighting fronts. Michael's grandparents, with whom he lives, cling to the Slavic language and to many "old country" customs, but Michael and his brothers and sisters are as American as the Smiths and Joneses. Pressed Steel Can Company, Chicago, Illinois