This story is currently using With Sidebar Page Template. Every story has three options for its story page: Full-Width, With Sidebar, or Long Form. Simply, select which you would like on the left hand side of the Edit Story page. The default for this option can be set on the SNO Design Options page under the options for Story Page and Comments.
You can design your sidebar by choosing which the widgets to display. Just go to Widget under Appearance on the Dashboard.