Orson Welles: Carole Lombard's plane was shot down by Nazi agents
Interesting theory by an interesting man:
http://www.vulture.com/2013/06/orson-welles-lunch-with-henry-jaglom.html
H.J.: Was it Norma Shearer, Thalbergs widow, who was killed in that plane crash?
O.W.: No, no. She wasnt killed in a plane. That was another thing that is amazing. After Thalberg died, Norma Shearerone of the most minimally talented ladies ever to appear on the silver screen, and who looked like nothing, with one eye crossed over the otherwent right on being the queen of Hollywood. Everybody used to say, Mrs. Thalberg is coming, Miss Shearer is arriving, as though they were talking about Sarah Bernhardt.
H.J.: Or Marie Antoinette.
O.W.: Youre thinking of whats-her-namethe good one.
H.J.: Gables girlfriendCarole Lombard.
O.W.: His wife. I adored her. She was a very close friend of mine. And I dont mean to imply that we were ever lovers. Do you know why her plane went down?
H.J.: Why?
O.W.: It was full of big-time American physicists, shot down by the Nazis. She was one of the only civilians on the plane. The plane was filled with bullet holes.
H.J.: It was shot down by who?
O.W.: Nazi agents in America. Its a real thriller story.
H.J.: Thats preposterous.
O.W.: The people who know it, know it. It was greatly hushed up. The official story was that it ran into the mountain.
H.J.: The agents had antiaircraft guns?
O.W.: No. In those days, the planes couldnt get up that high. Theyd just clear the mountains. The bad guys knew the exact route that the plane had to take. They were standing on a ridge, which was the toughest thing for the plane to get over. One person can shoot a plane down, and if they had five or six people there, they couldnt miss. Now, I cannot swear its true. Ive been told this by people who swear its true, who I happen to believe. But thats the closest you can get, without having some kind of security clearance.