Brussels' mayor has canceled the Belgian capital's annual New Year's Eve celebration because of a terror threat as several cities around the world ramped up security.<br />Speaking to Belgian broadcasters, Mayor Yvan Mayeur said that according to a crisis center analysis it would not be possible to screen the tens of thousands of people who were expected to turn out for fireworks and other festivities.<br />Paris has tightened security, but says it will proceed with its New Year's Eve celebration.<br />Paris Mayor Anne Hidalgo told a French publication that France needs its symbolic passage into the new year, to "send a signal to the world" as it continues to recover from the attacks.<br />Meanwhile, thousands of police officers, some armed with long guns, radiation detectors and bomb-sniffing dogs, will be guarding the massive New Year's celebration in New York City's Times Square.
