Breakthrough technology has been used to identify the remains of a man killed in the 9/11 attack.
Nearly 16 years later the victim, whose family requested his identity stay private, is the 1641st person whose remains were identified after the World Trade Centre towers were hit by planes and collapsed.
More than 2700 people were killed in the terrorist attack, and the last person to be identified was in March 2015.
The remains were discovered by New York City's Office of the Chief Medical Examiner, which has been re-testing DNA recovered during the clean-up effort this year.
Technology has previously been limited in its ability to test samples.
Since 2001, DNA technology has progressed alongside a multi-million dollar push to connect 21,900 pieces of remains to the lives from which they came.
Researchers have begun using a method that atomises some of the remains before re-testing the sample against DNA samples provided by family of the lost victims.
There are 1112 people who haven't been identified, and families have had to wait for slow discoveries that might be made in order to seek closure after the tragic event.
Very few bodies were recovered intact after the event, and external factors such as heat from jet fuel, bacteria and chemicals from the explosion and collapse made the unearthing of bodies difficult.
US Correspondent Patrice Howard spoke to Duncan Garner.
Watch the video for the full interview.