Monday on Alaska News Nightly Researchers look for ways to predict where Arctic rivers will turn red next. Also, homelessness is on the rise in Alaska's only ski resort community. And, even after 60 years, Ketchikan thespians keep a play about fish piracy feeling fresh. Reports tonight from: Maggie Nelson in Unalaska Avery Ellfeldt in Haines Desiree Hagen in Kotzebue Hannah Flor in Anchorage Kathe...