1: The cheeseburger's origin in the USA dates back to the early 20th century.

2: Lionel Sternberger is credited with inventing the cheeseburger in Pasadena, California in 1926.

3: Sternberger added a slice of American cheese to a hamburger at his father's restaurant.

4: The cheeseburger gained popularity during the Great Depression as an affordable and filling meal.

5: By the 1950s, the cheeseburger had become a staple in diners and fast food restaurants nationwide.

6: McDonald's introduced the iconic cheeseburger to their menu in the 1960s.

7: Today, the cheeseburger is one of America's favorite fast food items.

8: From gourmet restaurants to food trucks, cheeseburgers are enjoyed in various forms across the country.

9: The cheeseburger's rich history in the USA continues to evolve with new and creative variations.