Right now, the National Archives in Washington DC are hosting an exhibition about government and food. Titled "What's Cooking, Uncle Sam?," it covers everything from government regulations on food processing and labeling to nutritional campaigns for such things as, er, "Vitamin Donuts." Smithsonian magazine was particularly intrigued by the exhibition's information about US presidential diets. Above, Richard Nixon's last meal in the White House, "slices of pineapple arranged around a plop of cottage cheese, paired with a glass of milk and served on a silver tray."
"What's Cooking, Uncle Sam?: The Government's Effect on the American Diet" (National Archive)