Terrorism has become an international concern and has been shaping the relationship within the international system. This has led to concern with the security of international events, especially with existing precedent, such as the Munich Olympic Games, and after the 9/11 attacks in the US. There has been growing imposition on the host countries to comply with security requirements that would prevent these attacks. Therefore, the objective of this study is to analyze how countries within South America deal with these requirements, using as a reference the FIFA World Cup 2014 in Brazil. The hypothesis is that while conforming to the security requirements necessary to hold the World Cup, the Brazilian state’s sovereignty is injured. Thus, this study will verify how Brazil tries to balance these conflicting issues through the analysis of the transformation of their legislation in order to adhere to the international event in question.