Chamonix Skywalk, France: A journalist, wearing slippers to protect the glass floor, stands in the just opened "Step Into the Void" installation at the Aiguille du Midi mountain peak above Chamonix, in the French Alps. The Chamonix Skywalk is a five-sided glass structure installed on the top terrace of the peak with a 3,280-foot drop below. Photograph by Robert Pratta, Reuters December 26, 2013
