South Africa's homicide rates have declined consistently since democracy, but remain among the highest in the world. They are about four times the global average at more than 30 per 100,000 people.
It has been 10 years since British police shot and killed an innocent man in Stockwell station.
While the US still dominates global arms exports, Russia takes a close second as rising instability increases demand for the latest high-tech weaponry and surveillance gear.
Classrooms are places of genuine human engagement, debate, thought and passion. Guns undermine the openness and vulnerability necessary for learning.