Join NFL writer Steve Corkran as the 49ers take on the Chicago Bears in a match-up of two of the NFL's top defensive teams. <iframe src='http://embed.scribblelive.com/Embed/v5.aspx?Id=70716&ThemeId=5802′ width='475′ height='600′ frameborder='0′ style='border: 1px solid #000′></iframe>