Canadian authorities yesterday declared they had foiled a chilling bomb plot aimed at several targets in their country - busting an al Qaeda-inspired cell with likely connections to a pair of Atlanta-area men indicted on terror charges. The 17 suspects - including five youths 18 or under - were busted Friday night and yesterday morning at locations in and around Toronto, following a delivery of three tons of ammonium nitrate and other explosive components. The tonnage was three times the amount used in the 1995 bombing of the federal building in Oklahoma City. New York City police said they were...