Everyone knows Popeye the sailor. And everyone knows his secret. Whenever the cartoon sailor is on the verge of a fight, he squeezes open a can of spinach, pours the greens down his throat, and uses his muscles to pummel his opponent.
Few people know that the U.S. government is directly responsible for Popeye's dependence on the canned green vegetable. In the 1930's, America was mired in the Great Depression. The U.S. government was looking for a way to promote iron-rich spinach as a meat substitute. To help spread the word, they decided to hire one of America's favorite celebrities, Popeye the Sailor Man.