US Agency’s Nevada Boss Urges Roundup of 4,000 MustangsUS Agency’s Nevada Boss Urges Roundup of 4,000 MustangsRENO, Nev. (AP) — The U.S. Bureau of Land Management's Nevada director wants to free up more federal rangeland for livestock grazing this summer by rounding up 4,000 wild horses in Elko County.Associated PressAssociated Press