WASHINGTON - On Wednesday, Congress voted to override President Barack Obama's veto of a bill allowing September 11th families to sue Saudi Arabia over the attacks.

The House followed the Senate, voting to override President Obama's veto.

The House voted 348 to 77, while the Senate voted 97 to 1.

President Obama vetoed the Justice Against Sponsors of Terror Act last week.

He says the measure could subject the United States to retaliatory lawsuits in foreign courts which could put American troops in legal trouble. 

But supporters of the bill say it is very narrow in scope and applies only to acts of terrorism that occur on U.S. soil.

Fifteen of the 19 hijackers who carried out the attacks were Saudi nationals. 

Investigators have not been able to prove allegations that the attackers were tied to the Saudi government. 

President Obama has vetoed nine bills during his time in office, but this was be the first to be overturned.