Dallas—or rather a version of Dallas that you might recognize today—didn't exist until 1963. Before then, the city had been carefully crafting a reputation based on its entrepreneurial acumen and can-do spirit, beginning with the Texas Centennial Exposition at Fair Park in 1936. Over the next two decades, Dallas' population would grow by more than 130 percent, a postwar boom sparked by hopes and possibilities. The old-guard business community quietly ruled over all, and business was good–new sources of money sprang up everywhere, from theme parks to football teams and room-size computers. Then President John F. Kennedy came to town on November 22, 1963, and Dallas would never be the same.