Could a 20,000-seat Olympic field hockey arena really leave Jackson Park unspoiled?

A couple weeks ago Mayor Daley took his Olympics dog-and-pony show to the Walt Disney Magnet School on the north side, far from the south-side neighborhood parks that will be overtaken if his plans for the 2016 games go through.

As PR spectacles go, it was pretty impressive. The stage was filled with Olympic stars. The auditorium was packed with kids hopped-up to be out of class and eager to cheer on cue for the TV cameras.