Excellent list of photos there! And fascinating debate here afterwards.

Being from South Africa I have to added the photo that helped to change our country - where school boy Hector Peterson was shot & killed by police during a student protest in 1976.

http://www.sahistory.org.za/pages/classroom/pages/projects/grade12/lesson9/Images/petersen.jpg

A link for more about that story: http://www.southafrica.info/ess_info/sa_glance/history/hector-pieterson.htm