Click here if you wish to access the source of following 3:08m video from Real News Network.
Here you will view actual film footage of an historical incident not likely covered in your eduction, or if it was, it was a highly sanitized version. This is only one incident illustrating a common practice throughout US history: the use of the machine guns and other weapons to intimidate working people who used the only weapon they had against oppressive company policies and practices: withholding their labor. This occurred in the Columbine Mine massacre in 1927, and in many general strikes such as those which occurred in Seattle in 1919, in the 1930s in San Francisco and Minneapolis, and many other places.