The U.S. Justice Department will reveal the identity of a person believed to be connected to the Saudi government and accused of aiding two of the 9/11 hijackers.
The name the Department plans to release comes from a 2012 FBI investigation into three people said to have assisted two of the hijackers in Southern California.
The other two names are already known.
News of the disclosure has come just one day after the 18th anniversary of the attack.