This is the logo for the Burnham Plan Centennial.
Daniel Burnham designed the plan for Chicago. The actual centennial anniversary of this plan is on July 4, 2009.
When I saw the logo, it immediately made me think 
of this crop circle reported in early May 2009, particularly the part on the far right end of this picture.
Here’s some analysis of this glyph by Clif High at halfpasthuman.com.
I’m sure that’s just a total coincidence that the bottom section of this glyph and the Burnham logo have an eerie similarity, right?
Two nested circles and a big arc touching a smaller circle.
I have two circles for you, and they go like this: o_O
#1 by malcontent on May 21, 2009 - 4:37 am
Looks like boobies to swine like me.
#2 by A. Peasant on May 21, 2009 - 5:07 am
Ok. Thanks for playing young padawan. Better luck next time…
#3 by Sis on May 21, 2009 - 8:23 am
…or you could say they look like swine balls, but you gotta have them to see them.