Acts of agression by the U.S. government informs a culture of violence.

 Violent acts of the U.S. military promoted by the U.S. government tell the nation to be more violent.
For example soldiers in Afganistan fighting and killing the other countries soldiers.

The governemnt promotes violent acts to be seen on tv and in news papers.
For example the story of the 6 year old boy shooting the 6 year old girl.

The government promotes gun sales and easy access to guns which allows the country to carry out the aggression they have been informed of.
For example almost every one in the country keeps a gun in there home.