Keywords: sdasm aviation aeronautics san diego air and space museum sandiegoairandspacemuseum ryan lindbergh monochrome blackandwhite outdoor black and white Training planes at March Field. "Hissos on the line."--handwritten note by TCR Photo from the "Early Days" of Ryan Aeronautical Repository: San Diego Air and Space Museum Archive Training planes at March Field. "Hissos on the line."--handwritten note by TCR Photo from the "Early Days" of Ryan Aeronautical Repository: San Diego Air and Space Museum Archive |