Week in pictures

Technicians dangle from a series of ropes before polishing the underside glass at Grand Canyon Skywalk. The more than 40 panes of glass underneath the horseshoe-shaped bridge on the Hualapai reservation arenu0092't easily accessible. The structure juts out 70 feet from the edge of the Grand Canyon, offering visitors a view of the Colorado River 4,000 feet below.  George Walsh/AP