 The numbers you need to know today, 15, 30, and 20. Stage 1 done at lap 15. Stage 2 complete at lap number 30. Then a 20-lap run to the black and white checkered flag. How they pit, what their strategy is may determine who goes to victory lane. More on that in a moment. Now, track side for the command here at Chicago. Chicago, this is the moment you've been waiting for.