Check out these shots from this morning's race in Chicago!
He ran sub-2:19 at altitude.
She needs to stay with pacemaker Patrick Rizzo.
And there's no catch: it's free.
It will be 70 degrees by the time many runners finish the race.
She is the older sister of two-time Olympic gold medalist, Tirunesh Dibaba.
The marathon is timed when the city most needs the tourists dollars.