This June 2011 file photo shows Grizzly bear No. 399 crossing a road in Grand Teton National Park, Wyo., with her three cubs. People now can use their phones to find out where somebody has just seen a bison, wolf or grizzly bear in Yellowstone National Park. The new apps take wildlife viewing to a new level but not without raising concerns for the well-being of wildlife, park rangers and the tourists themselves.
Read the article: Yellowstone gets apps