In this Tuesday, March, 25, 2014 photo provided by Abseilon USA via AZ Photos, technicians dangle from a series of ropes before polishing the underside glass at Grand Canyon Skywalk…
AP
2 of 4
In this Tuesday, March, 25, 2014 photo provided by Abseilon USA via AZ Photos, technicians dangle from a series of ropes before polishing the underside glass at Grand Canyon Skywalk…
AP
3 of 4
In this Tuesday, March, 25, 2014 photo provided by Abseilon USA via AZ Photos, technicians dangle from a series of ropes before polishing the underside glass at Grand Canyon Skywalk…
AP
4 of 4
In this Tuesday, March, 25, 2014 photo provided by Abseilon USA via AZ Photos, a technician dangles from a series of ropes before polishing the underside glass at Grand Canyon…
AP