Full width header not full width

http://www.waltonhickman.com/
WordPress 3.9.1
ATA 3.7.15

For some reason my full width header has a space on the right side about 15-20px wide. The space, however, is not on the full width footer.

I have looked thru the code and not found anywhere that could be giving me, what I can assume is a righthand margin. The space ends up creating a horizontal scroll bar at the bottom and it looks bush league :P

I've got a coming soon plugin on, so I probably need to give admin access for the issue to be properly addressed.