Imagine a visiting spacecraft from another world, or dimension, hovering over a panicked and blacked-out LA in the middle of the night just weeks after Pearl Harbor at the height of WWII fear and paranoia. Imagine how this huge ship, assumed to be some unknown Japanese aircraft, was then attacked as it hung, nearly stationary, over Culver City and Santa Monica by dozens of Army anti-aircraft batteries firing nearly 2,000 rounds of 12 pound, high explosive shells

A mini-documentary about Crop Circles shows evidence of not manmade origin:

Great documentary on crop circles:

Crop Circles The Best Evidence - Part 2

Uk military and Crop circles

an interesting watch Steven M. Greer, M.D. goes into the background of the Disclosure Project