A threat made Friday that mentioned U.S. Sen. Susan Collins forced several schools from Machias to Bangor and Aroostook County into a “soft lockdown.” School remained in session, but no one could enter or leave the buildings without authorization. A business in Orono received the threat Friday morning through a “vague, email message,” according to Orono High School Principal Reg Ruhlin. Scott Porter, the superintendent of Machias schools, said the threat specified Collins and listed high schools in Bangor, Brewer, East Millinocket, Caribou, Houlton, Madawaska, Jonesport, Machias and Harrington. School districts did not see the actual message, according to Brewer...