BRAZIL
ERALDO PERES
Brasilia, Brazil— Soldiers in hazardous materials suits conduct a chemical attack drill on July 28 outside the National Stadium, which will host some 2016 Summer Olympics soccer matches. Just a week before the opening ceremony for the games on August 5, the government said it would bring in an extra 3,000 National Guard troops, including retired police officers, after a private security company said it had failed to hire enough workers to provide security checks at the gates of venues. Security concerns are high after recent attacks in France and the United States.