The FAA has canceled the temporary flight restriction (TFR) over the World Trade Center site in New York City. The action restores most of the New York Class B airspace to its pre-9/11 status. In effect since September 11, the flight restriction prohibited aircraft from operating below 8,000 feet within a two-nautical-mile radius of "ground zero." The TFR also blocked the Hudson and East River Class B exclusion areas—commonly known as the Hudson and East River corridors. Because of the existing TFR over the Statue of Liberty and ongoing homeland security concerns, AOPA urges pilots to exercise extreme caution by checking notams carefully before every flight and avoiding overflight of security-sensitive locations.