Source: http://gizmodo.com/using-explosives-to-put-out-wildfires-is-actually-a-gre-1579732658
Picture this: a drought-fueled wildfire is heading for Los Angeles, and fast. Millions of lives are at stake, and water can't stop it. When suddenly, a helicopter—armed with what can only be described as a giant cannon—flies straight for flames and BOOM. There's an explosion, and the fire's gone.
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