51.   I anxiously asked the park ranger at the desk.

52.   If the request is authorized, the youth corps then accepts volunteers and supervises them under the direction of park rangers.

53.   In a brutal scene that will sting animal lovers, Powell kills two Rwandan park rangers in a bid to protect the doomed gorillas.

54.   In addition to the big reward, the Phoenix City Council is thinking of hiring new firefighters and park rangers to solve the arson case.

55.   In Yellowstone National Park, by contrast, the administration has infuriated environmentalists and many park rangers by abandoning a Park Service plan to ban snowmobiles.

56.   In Yellowstone National Park the administration has infuriated environmentalists and many park rangers by abandoning a plan to ban snowmobiles.

57.   Irish recommends that people get permission from park rangers before hiding a cache.

58.   It is so braided with chemicals and salt that fish, birds and animals that use it are dying, park rangers say.

59.   It turns out, park rangers at the eastern entrance to the park were counting cars, coming and going.

60.   It was then that the last two animals were killed by park rangers near Soda Butte in the Lamar Valley as part of a formal extermination program.