UC Berkeley, poised to clear the Memorial Stadium oak grove for a sports training center, has asked the city for help to control a growing encampment on a nearby street median of people who support tree-sitting protesters. Campus Police Chief Victoria Harrison last week asked the Berkeley police and city manager's office to remove the encampment, which includes 10 to 20 people, tents, dogs, sleeping bags and banners along about 100 feet of the city-maintained divider on Piedmont Avenue. "The median is not meant to be a campground or a park. It's a major traffic artery for campus," said Harrison....