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Luca Bruno, Associated Press
In this picture taken on Jan. 26, 2015, a view from a above of the construction site of the upcoming World Exhibition Expo 2015, in Rho, in the outskirt of Milan, Italy. With less than three months to opening day, Expo commissioner Giuseppe Sala, during a press conference in Milan Thursday, Jan. 29, 2015, gave an overall positive balance, noting that 8 million tickets had been sold, nearly one-third of the 24 million projected, and nearly 80 percent of the construction is finished.

MILAN — Milan Expo 2015 world's fair officials say they are heightening security following last month's terror attacks in Paris.

Event commissioner Giuseppe Sala said Thursday that "the events in Paris made us focus even more attention on security" protocols, which have been in the works for 18 months with the Italian defense department, secret services and local law enforcement.

The Expo grounds will be surrounded by a security fence, arriving visitors will be subject to controls similar to those at airports, and more than 2,000 security cameras will be activated.

With less than three months to opening day, Sala gave an overall positive report, noting that 8 million tickets have been sold, one-third of the 24 million projected sales. More than 80 percent of the construction work is completed.