Law enforcement authorities on three islands and opponents of the Thirty Meter Telescope are ramping up this weekend for what could be a long series of protests on Mauna Kea, with Hawaii County police going so far as to mount tear gas “cannons” on heavy vehicles used by its special response team, sources said. Read more Mahalo for reading the Honolulu Star-Advertiser! You’re reading a premium story. Read the full story with our Print & Digital Subscription. Subscribe Now Log In Already a subscriber? Log in now to continue reading this story.