Yellowstone sees 3 million summer visitors

Video: Bear attacks are worrisome trend

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   >>> anyone who has been to yellowstone national park remembers seeing old faithful, the incredible water falls, bison and elk and maybe even a bear, sometimes man and nature come too close together, though. this summer bears have killed two people in america's oldest national park . we have more tonight fr.m

   >> reporter: it's breathtaking vistas are nature at its finest, but beyond the golden rolling kills at yellowstone national park is a renewed sense of danger. today the merry mountain trail is closed, this is where hikers discovered the body of 59-year-old john wallace , he was mauled by a grizzly as he hiked alone.

   >> my brother absolutely loved the outdoors and worked in one of the national parks and loved to just hike in nature.

   >> reporter: there's been only seven fatal bear attacks, but two have come just this summer. rangers are so concerned they have set traps to trap the bear. once inside the bear trips the lever, then the gate slams shut. across the west, it's been a summer of vicious attacks.

   >> it bit down on my head.

   >> reporter: sam was hiking with friends just north of anchorage this summer when he was mauled by a grizzly.

   >> i kept saying i'm going to die, i'm going to die.

   >> the bears are real intent on feeding so you're more likely to have an uncounter this time of year.

   >> reporter: people are pushing limits infringing on bear territory. since 2000 , there's been an average of three people killed by bears every year.

   >> it's still a beautiful place, and why give that up? it's definitely a concern.

   >> reporter: late today, park rangers captured a bear, dna testing will determine if it's the killer grizzly. meantime, rangers say yellowstone

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