History: Liquid-width section in page
Preview of version: 2
On this page only, the Bootstrap container div that's the middle area of the page is 100% wide [it overrides the default container width (1170px in large screens, etc.)], and it holds the three divs that are also 100% wide and have colored backgrounds; each of these holds a Bootstrap container div whose width is the default width. This arrangement provides full-page-width color backgrounds, and is all responsive, etc.
The left column (in a two-column layout) is hidden to show this demonstration clearly.
Content for stories goes here.