Is Chicago about to have a major riot or some urban warfare due to a NATO Summit? Is this why the black helicopters were flying around last week?
http://www.myfoxchicago.com/dpp/news/metro/nato-summit-library-tower-condo-association-summits-warning-residents-letter-riots-protests-state-street-20120420
Recent military activity in Chicago's immediate downtown area:
http://thenewsunit.blogspot.com/2012/04/urban-warfare-drill-comes-to-chicago.html
...developing...