Detailed text transcripts for TV channel - MSNBC - 20130609:17:29:00
Laser altimeter, a scanning system that sweeps a beam across the surface of the glacier as we travel over it with aircraft. >> reporter: and the surface elevation of more than 200 glaciers. glaciers exist because too much snow falls in one particular place. the snow flows down the mountain, turns into ice, and melts or breaks off into the ocean. but when more or less melting occurs than snowfall, the glacier becomes out of balance. >> it's a global phenomenon that affects all communities within close proximity to the sea level rise. >> reporter: something that operation ice bridge hopes to min...
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