 Take control of Alaska's driving conditions. For your light truck or SUV, buy your Cooper Discoverer Rugged Trek at GCR. GCR Tires and Service, the tire guys. Haming the Alaskan Road, Van Hornet Cushman. Hi, this is Heidi Rader, professor of extension with the University of Alaska Fairbanks. As a lifelong Fairbanksan, I've seen many changes in what we can grow. Choke cherries used to be one of the few ornamentals that thrived here. Now they're doing too well and spreading. They're poisonous to moose and bad for salmon.