http://abcnews.go.com/International/iran-ordered-pay-billions-relatives-911-victims/story?id=54862664
Iran had nothing to do with it. Let's see what comes out of this… might be an interesting plot-twist.
Despite the fact that 15 of the plane hijackers were Saudi nationals and the remaining were from The United Arab Emirates and no direct link was ever found to Iran On March 9, 2016, Daniels issued a default judgment against Iran, ordering it to pay $7.5 billion in damages to families of victims who died in the September 11, 2001 attacks, as well as $3 billion to insurers such as Chubb Limited that paid out claims resulting from the event. The plaintiffs in the case argued that Iran "provided material support" and training to al Qaeda members, including 9/11 hijackers, through Hezbollah prior to the attacks and was therefore liable. Earlier in 2015, Daniels had ruled that Saudi Arabia had sovereign immunity and dismissed all charges against the kingdom for its alleged role in the attacks.
https://en.wikipedia.org/wiki/George_B._Daniels#Notable_Judicial_Actions