The U S Army is in the process of conducting urban military training exercises in Chicago. This is not the first metropolitan area to see these types of exercises.
Much more info is available at http://www.infowars.com/army-conducts-nighttime-exercises-in-downtown-chicago/
When one considers Obama’s strong efforts to curtail the 2d Amendment Constitutional right of Americans and these various urban training exercises there are various scenarios that come to mind and they are not very cheerful.
Anyway, check out the info above.