ORIGINALLY POSTED ON APRIL 18, 2016:
Saudis warn of economic reprisals if Congress passes 9/11 bill
U.S. senator Bob Graham (interviewed in the video included in the CNN article linked above) is the author of the book Intelligence Matters, which alleges that a funding chain for terrorism led to the Saudi royal family.
MAY 1, 2016 UPDATE:
CIA chief: 'No evidence' of Saudi backing of 9/11 attacks
You can read a transcript of CIA director John Brennan's May 1 interview on the NBC News show "Meet the Press" here. (Scroll down to Mr. Brennan's remarks.)