Nation's only Buffalo Roundup draws crowds to South Dakota | News
South Dakota cowboys and cowgirls are rounding up a herd of more than 1,500 bison as part of an annual effort to maintain the health of the species, which has rebounded from near-extinction. Visitors came from across the world watched the thundering wooly creatures run over hills and grasslands Friday. Officials say Custer State Park hosts the nation's only bison roundup.