[Theme: Twenty Eleven] How do I get an image to be the full width of the page?

I’m using twenty eleven and have managed to get the page content wider but I can’t get an image to be the full width of the page. This is what I have for page in my css. I am using a child theme.
#page {
margin: 1.5em auto;
max-width: 1000px;
border-top: 15px solid #ffffff;
border-bottom: 15px solid #ffffff;
-webkit-border-radius: 15px;
-moz-border-radius: 15px;
-o-border-radius: 15px;
border-radius: 15px;
}
The image is 1000px wide.
Here’s the link: http://vps2782.inmotionhosting.com/~wa3k6yh/?page_id=2

http://wordpress.org/extend/themes/twentyeleven/