Teamsters challenge minister's move to resume rail service as shutdown drags on

Rail workers fought back Friday against the federal government's move to get them back on the job, with a fresh strike notice and a regulatory challenge making it unclear when most freight traffic will resume. At Canadian National Railway Co., trains began to move again Friday morning as workers started to return -- even as the Teamsters union issued a 72-hour strike notice against CN shortly before 10 a.m. EDT.Download the CTV News App for breaking news alerts and video on all the top storiesAn