Brazil to intensify Olympic security checks after Nice attack

By Paulo Prada RIO DE JANEIRO (Reuters) - Brazil will step up security cordons, add further roadblocks and frisk more visitors in Rio de Janeiro for next month's Olympic Games to increase security after the truck massacre in France, the government said on Friday. Already on guard because of recent attacks in Paris, Brussels and Orlando, Brazilian officials met to re-assess preparations for the Games, which start Aug 5 and are expected to attract as many as 500,000 foreign visitors. Authorities h