describe the connection between student unrest and the vietnam war
http://en.wikipedia.org/wiki/Protests_against_the_Vietnam_War
http://en.wikipedia.org/wiki/Kent_state#Kent_State_shootings
http://en.wikipedia.org/wiki/UC_Berkeley#1960s_and_the_Free_Speech_Movement
http://en.wikipedia.org/wiki/Students_for_a_Democratic_Society_(1960_organization)
As with all articles in Wikipedia, be sure to go through all the external links at the bottom of each page for further reference.