The U.S.-Saudi relationship appears to be on the rocks.

Most recently, the rift of 9/11 has been reopened. This month "60 Minutes" reported on the still-classified final chapter of a 2003 Senate report on the attacks, which it said would show that some Saudi officials, charities and wealthy individuals supported two of the 9/11 hijackers.

The Saudi connection is especially relevant now because Congress is considering legislation to allow the families of 9/11 victims to sue Saudi Arabia for damages. Saudi officials are warning the White House, according to The New York Times, that the kingdom would sell off hundreds of billions of dollars worth of U.S. assets if that bill became law.