Found this article which gives more historical perspective: https://www.washingtonpost.com/world/national-security/outgoing-director-robert-s-mueller-iii-tells-how-911-reshaped-fbi-mission/2013/08/22/ee452170-0b54-11e3-9941-6711ed662e71_story.html?utm_term=.fd0d2131ba47
RE: Mueller Probe Accidentally Exposes FBI Cover-Up of Saudi Role in 9/11