The 911 families wishing to sue Saudi Arabia are ignorant of the 2 governments most involved in causing the bombing of the World Trade CenterSept 11, 2001.

Some of the billions who doubt the US Government story of how 911 happened
Lt General Albert Stubblebine, formerly in charge of collation
of all intelligence for the Joint Chiefs of Staff, said a plane could
not have hit the Pentagon. There were no wingscars. The Cruise missile was aimed at the area of civilian employee concentration.
President Francesco Cossiga of Italy who died shortly after his assertions, former German defense minister and later minister of research and technology Andreas Von Buelow, French author of dozens of books Thierry Meyssan, Russian General Leonid Ivashov, Fidel Castro, past leaders of the Egyptian and Iranian governments, Roman Catholic bishop Richard Williamson, leaders of the Japanese Diet, many in European intelligence agencies, former governors Jesse Ventura of Minnesota and Walter Peterson of New Hampshire, Alan Hart, a former BBC correspondent, Philip Shenon of the NY Times, 41 U.S. Counter-Terrorism and Intelligence Agency veterans are some of the hundreds of
millions who know the US Government lied and continues to lie about 911

If we ask the Columbo question 'cui bono' or "Who benefits?" one sees the many who profiteered from the immediate outcome which was the US government entry into Afghanistan a mere 6 weeks after the attack. Meanwhile the BBC had on its website for a short time a story that 9 of the alleged 911 perpetrators had been found alive in Europe.
An Israeli firm, ICTS, had security contracts at all the airports involved.

Hillary Clinton is one of several presidential candidates lying about 911.

http://911truth.org
Lt General Stubblebine on 911 hoax
https://www.youtube.com/watch?v=PUrF8dQo9uc
https://archive.org/stream/9-11CopBreaksSilence-IsraeliMossadInvolvementInAttacks/9-11CopBreaksSilence-IsraeliMossadInvolvementInAttacks_djvu.txt
http://www.hereinreality.com/insidertrading.html#.VxTgKvkrLbg
http://www.rense.com/general73/whyd.htm
http://www.rense.com/general69/91185.htm
http://www.rense.com/general65/aj.htm

Note: The polygamous sheiks who rule Saudi Arabia are involved in stoning women accused of adultery, decapitation of gays, torture of socialists and other prisoners, oppression of the imported work force, suppression of women's rights, the slaughter of millions of mammals annually for the Haj, intolerance to all religions and belief systems which are not Wahhabi Islam. One incident in which they are not involved is the bombing of the WTC.

Google images suppress picture of the English translation of Von Buelow's book