Pre-WWII - 1940 ca, Seattle Anti-Aircraft Defenses Set Up

Seattle Anti-Aircraft Defenses Set Up VS troops moving around heavy guns & trucks placed on open ground w/ city skyline in BG - Seattle. MCUs guns assembled. Guns on revolving platforms being aimed upwards. Boeing plant visible in BG. 15:16:41 Convoy of military vehicles out of building & along street. Further shots of completed gun placements & defense exercise - troops crouching & firing rifles in air - CU shell loaded - troops aiming at light model? plane flying over - heavy guns aimed & loaded. Pre-WWII. West Coast. US Army Training; ca 1940; Pre-WW2;