Here is a great place to start digging.
Chicago ….
https://www.sidley.com/en/us/
Chicago …
Sidley Austin -→Hussein
https://blogs.wsj.com/law/2007/05/11/sidley-austin-when-barack-met-michelle/
Sidley Austin -→ Twin Towers
https://www.questia.com/magazine/1G1-102661044/a-disaster-plan-in-action-how-a-law-firm-in-the-world