Thanks again to fateswebb.

"VP Biden to visit Detroit during auto show" 1/6/2017 http://www.detroitnews.com/story/business/autos/detroit-auto-show/2017/01/06/biden-naias/96256606/

"Obama to attend Detroit auto show" 1/15/16 http://thehill.com/policy/transportation/266084-obama-to-attend-detroit-auto-show

"2 children saved, 22 people arrested for human trafficking during Detroit auto show" 2/13/2017 http://www.clickondetroit.com/news/defenders/2-children-saved-22-people-arrested-for-human-trafficking-during-detroit-auto-show_

I am pretty confident it's not just a coincidence.