A large piece of airplane debris found close to the World Trade Center site in New York is believed to be landing gear from one of the planes which struck the twin towers in 2001.
The metal part has cables and levers on it and is about 3 feet wide and 1.5 feet deep.
New York Police Department Commissioner Ray Kelly said that it includes a clearly visible Boeing identification number.
Mr Kelly said the medical examiner would check the area around the site to see if it was toxic in any way.
"They will also check to see if there's any human remains at the site and then a determination will be made as to how to move the part from that location".
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