A vaccine against polio helps fight one of the world’s major diseases.
A break in at a hotel leads to the President having to resign.
Two brothers use their knowledge of bicycles to create a powered controllable plane.
The first astronauts set foot on the moon in 1969.
Slavery arrives in North America, where it will stay for centuries.
Settlers arrive in America from Europe.
A famous speech captures America’s imagination and boosts the civil rights movement.
Alcohol is banned in the US, creating a different set of social problems.
Another mass shooting hits an American campus.