Oh,the Kent State where National Guard troops were fired at first.
There were/are reports that college activists and radical fired at the guard and the guardsmen fired back in response.
If you ask me, kent State only proved that the NG needed to spend more time at the range.
Just looked it up. Seems there was someone there with a pistol. http://www.cleveland.com/science/index.ssf/2010/10/analysis_of_kent_state_audio_t.html