Three 9/11s, choose your own

There were three 9/11s in history. The New York one of 2001. The neo-liberal one of Chile 1973, and the non-violent one of 1906 - Gandhiji's satyagraha in South Africa. The authors of all three tried to change the world, but only the Mahatma's Weapon of Mass Disobedience helped change the world for the better, writes P Sainath.