US winter storm: Stranded Native Americans burn clothes for warmth- PublishedNative American tribal leaders in South Dakota are appealing for urgent help as snowed-in communities run out of vital supplies amid a winter storm.The Pine Ridge Indian Reservation has been buried in more than 30in (76cm) of snow, but powerful winds have stacked snow drifts 12ft (3.6m) high.She said one family had run out of infant formula and other supplies and spent four days trapped inside their home, before walking eight miles to get help because their baby was starving.And they have to be pulled out"When we clear a road, the next day it just fills back in with blizzard conditions and blowing snow."Wayne Boyd, chief of staff to the Rosebud Sioux president, told the Associated Press news agency: "We have families that are way out there that we haven't heard from in two weeks.""