The US Treasury Department has exposed Saudi Arabia’s total US debt holdings for the first time in 40 years, allowing analysts to answer the crucial question of whether or not Riyadh can carry out its threat to undermine America’s economy.

A month ago, Saudi Arabia’s Foreign Minister Adel Al-Jubeir threatened Washington, saying his country would sell off up to $750 billion in US Treasures and other assets, undermining the US economy, if a bill allowing families of 9/11 victims to sue the Saudis in a US Court passed in Congress.