The first article, "Old and New Sources of Weapons," discusses a subregional approach to combating weapons proliferation, traditional and new sources of weapons proliferation, the roles of guerrillas and the military, international terrorism, drug smuggling, crime, controlling the proliferation of small arms, and legislation. The second article examines changing patterns of violence in Buenos Aires and the necessity for a public debate on arms proliferation as part of a global solution. The third article examines the culture, prevalence and control of firearms in Rio de Janeiro. The article concludes that new legislation aimed at limiting the ownership and use of firearms will have a positive impact on public health, to the extent that it reduces the chances of domestic violence, for example. What escapes the focus of legislation, and what may be one of the sources of the public security crisis in Brazil, is acts of corruption and abuse by public officials responsible for the maintenance of law and order. Tables, figures, notes