This 2008 photo released by Extreme Ice Survey shows field technician, Adam LeWinter on an iceberg in Columbia Bay, Alaska during the filming of "Chasing Ice." The film, about climate c

 

              This 2008 photo released by Extreme Ice Survey shows field technician, Adam LeWinter on an iceberg in Columbia Bay, Alaska during the filming of "Chasing Ice." The film, about climate c
This 2008 photo released by Extreme Ice Survey shows field technician, Adam LeWinter on an iceberg in Columbia Bay, Alaska during the filming of "Chasing Ice." The film, about climate change, follows National Geographic photographer James Balog across the Arctic as he deploys revolutionary time-lapse cameras designed to capture a multi-year record of the world's changing glaciers. (AP Photo/Extreme Ice Survey, James Balog)