There were a number of problems this morning on the Danbury branch of Metro North.  The 6:08am train headed to South Norwalk was canceled due to mechanical issues and Metro North was going to accommodate customers on the 7:33 train.  That train was canceled due to a fallen tree near Redding.  Substitute bus service was provided on the Danbury Branch for the 9:19 train from South Norwalk to Danbury.  Normal service has since resumed.