Herbert Hoover, Age 25

Harry Truman, Age 22 And 33

Gerald Ford, Age 18 And 20

George W. Bush, Age 21

George W. Bush, Age 19

George H. W. Bush, Age 18

From its inception in 1927, Pan American Airways single-handedly revolutionized air travel and pioneered a new era of commercial flight. Pictured, one of its Boeing 377s photographed in 1949

Franklin Roosevelt, Age 18

Dwight Eisenhower, Age 25 and 29

During their 50s heyday there were over 4,600 drive-in movie theatres across the States.

Drive-in movie theatres first sprung up in the 30s. Here motorists during this decade watch films from the back seat of their vehicles at a drive-in in Los Angeles

Drive-in movie theatres date back to 1933 when Richard Hollingshead Jr first opened a screen in Camden, New Jersey

Calvin Coolidge, Between 19 And 23 Years

By 1932, the airline had upgraded to Sikorsky S-40 planes, which could carry 38 passengers and was marginally faster with a speed of 115 mph

Bill Clinton, Age 22