Wilbon: Defense still defines Bears' image

[police brutality]

http://api.tweetmeme.com/imagebutton.gif?url=http://espn.go.com/chicago/nfl/story/_/id/8451565/defense-leading-way-chicago-bears (http://api.tweetmeme.com/share?url=http://espn.go.com/chicago/nfl/story/_/id/8451565/defense-leading-way-chicago-bears&service=bit.ly&source=espn)Bears' veteran defenders not ready to take back seat to improved offense

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