Preventative Avalanche | National Geographic

Alaska State Troopers: Alaskan Standoff : http://channel.nationalgeographic.com... ➡ Subscribe: http://bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta An offier oversees an effort to start controlled, preventative avalanches — using a 105-millimeter Howitzer cannon. Preventative Avalanche | National Geographic    • Preventative Avalanche | National Geographic   National Geographic    / natgeo