Breaking down the Saudi Arabia, 9/11 lawsuit

Families of 9/11 victims seeking to hold Saudi Arabia responsible in the Sept. 11 attacks are asking if a video filmed in Washington, D.C., in 1999, backs the notion of the Saudi government providing crucial assistance to the 9/11 hijackers, an investigator told “60 Minutes” correspondent Cecilia Vega. CBS News contributor Sam Vinograd breaks down what is known at this time.