What painfully ironic warning was given on 29th November 1941, as part of the annual football game between the U.S. Army and U.S. Navy?
Answer: The program for the game carried a picture of the battleship Arizona, stating ‘it is significant that despite the claims of air enthusiasts no battleship has yet been sunk by bombs.’ A mere nine days later the Arizona would be sunk by dive bombers when the Japanese attached the US naval base at Pearl Harbor.
Source: The Ignorance Explosion by Julius Lukasiewicz