AA got their start in Chicago. (figures) purportedly CIA and mafia linked, see rabbit hole links at bottom for a trip.
http://www.chicagotribune.com/news/chi-0209030210sep03-story.html
In time, insiders at both disgraced firms now say, those close ties eroded the most important role Andersen was supposed to play as Enron's auditor: providing strong, independent verification of its financial reports.
As Enron collapsed into bankruptcy in December, further depressing a weakened stock market, Andersen leaders portrayed it as a client run amok. But a closer examination of their relationship reveals that, in Enron, Andersen found a monster partly of its own making.
https://www.thebalancesmb.com/sarbanes-oxley-act-and-the-enron-scandal-393497
A large scandal involving the public company Enron showed the American public and its representatives in Congress that new compliance standards for public accounting and auditing were sorely needed. Enron was one of the biggest and, it was thought, one of the most financially sound companies in the U.S.
A couple of links for a rabbit hole trip as Sept. 11, Enron, and Arthur A. appear intertwined…so much that there's too much to put in as high light without missing others.
http://911blogger.com/news/2012-11-27/what-do-afghanistan-enron-9-11-anthrax-and-iraq-have-common
https://rense.com/general21/end.htm