
Naked volunteers pose for U.S. photographer Spencer Tunick in the Aletsch region, Switzerland's in front of the Aletsch glacier August 18, 2007. Tunick held the photo session for a Greenpeace campaign to raise awareness of global warming. Tunick, perched on a ladder and using a megaphone, directed nearly 600 volunteers from all over Europe and photographed them on a rocky outcrop overlooking the glacier, which is the largest in the Alps. Later he took pictures of them standing in groups on the mass of ice and lying down. Camera crews were staged at five different points on the glacier to take photographs. Glaciers are sensitive to climate change and have been receding since the start of the industrial age but the pace of shrinkage has accelerated in recent years.