| 1. | 
        
    Photograph from Challenge episode with guests from Wisconsin Electric Power Co. This episode aired on February 14, 1960. | 
                | 2. | 
        
    Photograph from Challenge episode with guests from  Allis-Chalmers Nuclear Power Department. This episode aired on February 7, 1960. | 
                | 3. | 
        
    Photograph from Challenge episode with guests from Ampco Metal, Inc. This episode aired on January 24, 1960. | 
                | 4. | 
        
    Photograph from Challenge episode with guests from Evinrude Motors. This episode aired on January 17, 1960. | 
                | 5. | 
        
    Photograph of the Working Committee for the Development of Supporting Technical Personnel, a facet of the President's Committee on Scientists and Engineers. The chairman [...] |