This art piece is on the Carnegie Mellon University campus in Pittsburgh. I saw it when I was visiting the area over the summer. We passed it several times and I was intrigued by the size and location of it. It's called "Walking the Sky" by a CMU alum, Jonathan Borofsky.
I was sorry there was construction adjacent to it. We went around different portions of that side of campus trying to get a better photo of the sculpture without getting the fence line in, but didn't have any luck. So here is the best I could get just before the skies opened and a storm saturated the area. This is just another nice piece of Pittsburgh.