A Pentagon reports has found that partial remains of some victims of the September 11th attacks ended up in landfill.
Some small portions of unidentifiable remains from the Pentagon, and from the Pennsylvania field where a hijacked plane crashed in 2001, were given to a private contractor for disposal.
The fragments "could not be tested or identified," the review said.
The disposal came to light as the US defence department probed practices at the military's Dover Port mortuary.
An investigation by the Washington Post newspaper uncovered evidence that unidentified body parts were being cremated and disposed of in a landfill.