New York police say that part of what appears to be a section of landing gear from one of the jets that were flown into the World Trade Center during the 9/11 terror attacks has been found.
The debris was discovered wedged between two New York City buildings.
An investigation is now under way to see if any human remains can be recovered.
More top news
An Independence Day event at a UK base has been cancelled by the US Air Force over security fears.
British firms predict the economy should sustain a "solid" pace of growth for the rest of the year thanks to lower oil prices and inflation.
A charity has warned of a "pressure cooker environment" in schools putting children's mental health and self-esteem in danger.