Why? To control a forest fire.
Also, because they can. We have the technology — read the story here.
You might ask why we’re having so many forest fires lately. I think maybe because it’s 98 degrees in October and hasn’t rained in forever. But I keep hearing that global warming is some kind of communist myth, invented by Lenin and still perpetuated by him (he and Elvis are living in Manhattan, growing their sideburns and wearing black berets). So I must be wrong. Rush Limbaugh says forest fires are caused by uppity feminists and that every time a woman earns a master’s degree, God sends a lightning bolt down on some trees. OK, I AM KIDDING WITH THE POLITICS.
Also: here’s related video of firefighter peoples in Florida using not just ping pong balls and helicopters, but also airboats, aeroplanes and paintball guns.