I'm just catching up. Been off for a few days. It is hard to keep up with you guys/gals. That is amazing. I want to go. I'd be out there in a heartbeat. My heart racing and my legs shaking, but I would go. Never been to the Grand Canyon. Looks like I should go soon.Check this out. Found this one one of my glass publications
The walkway out is clear glass and will hold 71 million pounds....71 747's
Its cantilevered glass and steel framing has several layers of low Iron ultra clear tempered glass ..the vertical drop is 4000Ft.
great video of the canyon and construction and engineering
http://www.grandcanyonskywalk.com/home.html