As I noted last night, any type of deterrent protection whether it be gun or spray needs to used immediately. Most bear attacks are made with very little warning and
usually over in a few seconds. Add in the panic amongst the group along with a very determined and protective female bear and it is easy to comprehend what the outcome was.
Another thing to keep in mind, this could of happened anywhere bears inhabit and not just in Alaska. All my life, I have had enough bear encounters either on solo, 2 person to 4 person group hikes to know that the next encounter could be the last...you just never know.
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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.
John Lubbock