A global campaign to control the trade in deadly weapons will be stepped up at Glasgow University tomorrow when anti-gun campaigner Dr Mick North - whose daughter Sophie was killed in Dunblane tragedy in 1996 - leads a new push by Oxfam and Amnesty towards a United Nations arms treaty. Here, he explains why the issue means the difference between life and death. _________ Next month marks the 16th anniversary of my daughter's death. Sophie was just five when a gunman... (GunPolicy.org)