From an outsiders point of view:

- The Trail of Tears

- The Tuskegee syphilis study

- Use of Agent Orange in the Vietnam War

- Open Air biological warfare testts in civilians eg. in 1950 San Francisco

- The only use of nuclear weapons against civilians?

- Coca Cola and "american culture"

- Neoliberalist economy

- Spreading blame for their sins to other "white" nations

plus one: The text input method to HN comments :(