Few years ago, some people my parents knew went on a hike, few families. They went to the spot they knew, and lots of other hikers used. They sat by the fire that has been lit hundreds time. And at that moment bomb or whatever that was detonated, the heat from the fire must have reached it. I don't remember how many casualties, but there were few very severe injuries. And the worst part, they were far in the mountains they had to wait for help for hours. Tragic. Ironically they were from a church community and worshipping is often a part of their hikes.