Government officials plan haze a large herd of migrating bison back into Yellowstone National Park this week - an annual event that is again drawing opposition from wildlife advocates and American Indian groups.
Montana state veterinarian Marty Zaluski says an estimated 400 bison are outside the park in the West Yellowstone area. Government workers could start driving the animals back into Yellowstone using a helicopter as early as Wednesday.
Hundreds of bison leave the park annually during winter to graze at lower elevations.
Tribal officials on the Wind River Reservation continue to seek answers after the Department of Energy announced that uranium was found in some residents' tap water. DOE officials announced last week that data collected in the fall indicated that four households near a former uranium waste site had levels of uranium nearly twice the legal limit.