Airspace restrictions over major US cities

US: The skies above New Year's Eve revellers in New York and some other major US cities will be off-limits to certain aircraft…

US: The skies above New Year's Eve revellers in New York and some other major US cities will be off-limits to certain aircraft and patrolled by warplanes as part of increased vigilance for terror attacks, the Department of Homeland Security said yesterday.

Nine days after raising the nation's terror alert to its second highest level due to heightened fear of attack, the government said temporary flight restrictions, or TFRs, would be in place over Las Vegas, New York, Washington and downtown Chicago.

"We granted requests for TFRs ... over [some] areas for New Year's Eve," department spokeswoman Ms Rachael Sunbarger said.

The temporary flight restrictions, which apply to chartered flights and smaller leisure aircraft, but not to commercial flights, pertain to Las Vegas and New York City specifically during the New Year's holiday.

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New York City's Times Square and the Strip in Las Vegas are two of the more popular sites for New Year's Eve celebrations, as hundreds of thousands of people cram into the area to ring in the New Year.

Homeland Security Secretary Mr Tom Ridge has said the government would beef up security around large gatherings that are viewed as potential terror targets.

Flight restrictions will also be implemented for most holiday football games, including the Rose Bowl in Pasadena, California, on New Year's Day and the giant parade that precedes it.