By the mid-1960s, Americans have developed a taste for fast, delicious, affordable food — and they’re demanding more. U.S. fast food franchises — McDonald’s, Burger King and Burger Chef — know that if they want to feed America and win the burger wars, they’re going to have to grow. But Wall Street is still reluctant to invest in a bunch of burger chains. And Ray Kroc is about to learn firsthand that those who can’t stand the heat need to be forced out of the kitchen.Support us by supporting our sponsors!