5 images. Pasadena Filter Center new equipment operation, 17 January 1952. Staff Sergeant Robert Henry (of Army Air Force).; Caption slip reads: "Photographer: Snow. Date: 01-16. Reporter: Ostler. Assignment: Pasadena Filter Center New Equipment operation. General view of Filter Center with plotters at two boards in middle of room with Overlapp and Radar tellers on elevated structure in background. 27-36: Staff Sergeant Robert Henry of Army Air Force, an instructor at the center explains operation of new equipment. Filter is located at 171 South Grand Avenue, Pasadena".