A Huge Chunk of Glacier Is Falling; Will They Get the Shot? | Extreme Weather (Behind the Scenes)

See never-before-seen footage of how Extreme Weather director Sean Casey patiently waits to capture the extreme excitement of calving glaciers.

Get closer than you've ever been to collapsing glaciers, out-of-control wildfires, and tornado-whipped debris while discovering the surprising connections among these powerful forces. See National Geographic's film Extreme Weather in theaters in October 2016.