US park urges common sense amid rise in bison attacks

A pamphlet drawing of a man being gored and flung into the air graphically warns tourists in Yellowstone National Park not to get too close to bison: They're wild animals and can be very dangerous.

Rangers distribute the flyer to people as they enter the park, but some visitors still aren't getting the message. Bison have gored two people near the famous Old Faithful geyser within the past three weeks.

Increased tourism - up 18 percent in the park in May compared to the same month last year - has put more people close to the animals, Yellowstone spokeswoman Traci Weaver says.