for those too young to know about John Wayne in The Conquerer. It is not a very good film with Wayne in Oriental make up. It has become better known for a couple of things.
1)
Filmed near the site of contemporaneous nuclear testing grounds, the set was contaminated by nuclear fallout. After location shooting, much dirt from the location was transported back to Hollywood in order to match interior shooting done there. Scores of cast and crew members developed forms of cancer over the next two decades, many more than the normal percentage of a random group of this size. Quite a few died from cancer or cancer-related problems, including John Wayne, Susan Hayward, Pedro Armendáriz (who shot himself to death soon after learning he had terminal cancer), Agnes Moorehead, Thomas Gomez, and director Dick Powell,
2)
Eccentric billionaire Howard Hughes provided the financial backing for this film and later paid an extra $12 million (estimated) for every existing print of it from a sense of guilt - it was he who paid for the shipping of 60 tons of radioactive dirt to Hollywood for retakes (see above). He kept a jealous hold on the film, not even allowing it to be seen on television, for 17 years until 1974, when Paramount managed to secure the rights to reissue it.